hp / compaq 1900
TRANSCRIPT
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Maintenance & Service GuidePresario 1900 Series
Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,1922, 1925, 1926, 1927, 1928, 1929, and 1930
Before You Begin Specifications Parts Catalog
Removal Sequence Troubleshooting Battery OperationsProduct Description Pin Assignments Index
Presario 1900 Series
Welcome to the Maintenance & Service Guide(MSG). This online guide is designed to serve theneeds of technicians whose job it is to repairCompaq products. The Notice contains thecopyright and trademark information. The Prefaceshows symbol conventions, Technician Notes andSerial Number locations on the unit.
This MSG periodically will be maintained andupdated online as needed.
Tech Support..
To report a technical problem, contact yourRegional Support Center or IM Help Center.
For the best results when printing this MSG, setprinter properties to landscape.
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Maintenance & Service GuidePresario 1900 Series
Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,1922, 1925, 1926, 1927, 1928, 1929, and 1930
Before You Begin Specifications Parts Catalog
Removal Sequence Troubleshooting Battery Operations
Product Description Pin Assignments Index
Notice
The information in this guide is subject to change without notice.
COMPAQ COMPUTER CORPORATION SHALL NOT BE LIABLE FOR TECHNICAL OREDITORIAL ERRORS OR OMISSIONS CONTAINED HEREIN, NOR FOR INCIDENTALOR CONSEQUENTIAL DAMAGES RESULTING FROM THE FURNISHING,PERFORMANCE, OR USE OF THIS MATERIAL.
This guide contains information protected by copyright. No part of this guide may bephotocopied or reproduced in any form without prior written consent from CompaqComputer Corporation.
2000 Compaq Computer Corporation.All rights reserved. Printed in the U.S.A.
Compaq, Presario Registered U. S. Patent and Trademark Office.
Microsoft, MS-DOS, and Windows are registered trademarks of Microsoft Corporation.Windows 98 is a trademark of Microsoft Corporation.
The software described in this guide is furnished under a license agreement ornondisclosure agreement. The software may be used or copied only in accordance withthe terms of the agreement.
Product names mentioned herein may be trademarks and/or registered trademarks oftheir respective companies.
Maintenance and Service Guide
Compaq Presario 1900 Series Portable Computers
First Edition (Oct. 1998)Compaq Computer Corporation
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Maintenance & Service GuidePresario 1900 Series
Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,1922, 1925, 1926, 1927, 1928, 1929, and 1930
Before You Begin Specifications Parts Catalog
Removal Sequence Troubleshooting Battery Operations
Product Description Pin Assignments Index
Specifications
This chapter covers the following specifications of Compaq Presario 1900Series Portable Computers:
q Physical and Environmental
q System Interrupts
q System DMA
q System I/O Addresses
q System Memory Catalog
q Display Information
q Diskette Drive
q Hard Drive
q CD ROM or DVD Drive
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Maintenance & Service GuidePresario 1900 Series
Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,1922, 1925, 1926, 1927, 1928, 1929, and 1930
Before You Begin Specifications Parts Catalog
Removal Sequence Troubleshooting Battery Operations
Product Description Pin Assignments Index
Specifications
P h y s ic a l a n d En v ir o n m e n t a l
Computer Specifications
U.S. Metric
12.1 in TFT Dimensions
HeightDepthWidth
13.3 in TFT Dimensions
HeightDepth
Width
1.1 in11.6 in9.2 in
1.2 in11.6 in
9.2 in
234mm294.7mm29mm
234mm294.7mm
30.5mm
Weight
12.1 in TFT13.3 in TFTWedge
4.5 lbs5.0 lbs1.8 lbs
Stand-Alone (Battery Pack) Pow er Requirements
Nominal Operating
Maximum AveragePeak Operating
Li-ion
W @ 14.4 VW @ 14.4 VW @ 14.4 V
AC Power Requirements
Operating VoltageOperating CurrentOperating Frequency
Maximum Transient
100-240 V0.8/0.4 A RMS47-63 HzMeets IEC 801-4 and IEC801-51kV for 50 ns
Temperature
Operating 50 to 95 F 10 to 35 C
Nonoperating -4 to 140 F -20 to 60 C
Relative Humidity (noncondensing)
Operating 10 to 90% 35C to 90%
Nonoperating (tw = 38.7C max) 5 to 95% 60C to 95%
Altitude
Operating 0 to 10,000 ft 0 to 3.15 km
Nonoperating 0 to 30,000 ft 0 to 9.14 km
Shock
Operating 10 G, 11 ms, half sine
Non operating 240 G, 2 ms, half sine
Vibration
Operating 0.5 G
Nonoperating 1.5 G
NOTE: Applicable product safety standards specify thermal limits for plastic surfaces. CompaqPresario 1900 Series Portable Computers operate well within this range of temperatures.
Next Page
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Maintenance & Service GuidePresario 1900 Series
Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,1922, 1925, 1926, 1927, 1928, 1929, and 1930
Before You Begin Specifications Parts Catalog
Removal Sequence Troubleshooting Battery Operations
Product Description Pin Assignments Index
Specifications
S y s t e m I n t e r ru p t s
IRQ Device(s)
0 System Timer
1 Standard 101/102-Key or MicrosoftNatural Keyboard
2 Programmable Interrupt Controller
3 Ambit Modem
4 Communications Port (COM1)
5 NMA2 Audio Controller
6 Standard Floppy Disk Controller
7 Printer Port (LPT1)
8 System CMOS/Real Time Clock
9 Intel 82371AB/EB PCI to USB UniversalHost Controller
10 PCI Fast Ethernet DEC 21143 BasedAdapter
11 Texas Instruments PCI-1225 CardBusController
NeoMagic NMG5 Graphics Controller
12 PS/2 Compatible Mouse Port
13 Numeric Data Processor
14 Intel 82371AB/EB PCI Bus Master IDEController
15 Intel 82371AB/EB PCI Bus Master IDEController
Next Page
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Maintenance & Service GuidePresario 1900 Series
Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,
1922, 1925, 1926, 1927, 1928, 1929, and 1930
Before You Begin Specifications Parts Catalog
Removal Sequence Troubleshooting Battery Operations
Product Description Pin Assignments Index
Specifications
S y s t e m DMA
DMA Device(s)
0 NMA2 Audio Controller
1 NMA2 Audio Controller
2 Floppy Disk Controller
3 Parallel Port (ECP Mode)
5 Free
6 Free
7 Free
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Maintenance & Service GuidePresario 1900 Series
Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,1922, 1925, 1926, 1927, 1928, 1929, and 1930
Before You Begin Specifications Parts Catalog
Removal Sequence Troubleshooting Battery Operations
Product Description Pin Assignments Index
Specifications
S y s t e m I / O A d d re s s
I/O Address System Function (Shipping Configuration)
0000 - 000F Direct Memory Access Controller
0020 - 0021 Programmable Interrupt Controller
0040 - 0043 System Timer
0060 - 0060 Standard 101/102-Key or Microsoft Natural Keyboard
0061 - 0061 System Speaker
0064 - 0064 Standard 101/102-Key or Microsoft Natural Keyboard
0070 - 0071 System CMOS/Real Time Clock0081 - 008F Direct Memory Access Controller
00A0 - 00A1 Programmable Interrupt Controller
00C0 - 00DF Direct Memory Access Controller
00E0 - 00E1 Motherboard Resources
00F0 - 00FF Numeric Data Processor
0170 - 0177 Intel 82371AB/EB PCI Bus Master IDE Controller
01F0 - 01F7 Intel 82371AB/EB PCI Bus Master IDE Controller
0201 - 0201 Gameport Joystick
0274 - 0277 IO read data port for ISA Plug and Play Enumerator
0376 - 0376 Intel 82371AB/EB PCI Bus Master IDE Controller
0378 - 037F Printer Port (LPT1)
03B0 - 03BB NeoMagic NMG5 Graphics Controller
03C0 - 03DF NeoMagic NMG5 Graphics Controller
03F0 - 03F5 Standard Floppy Disk Controller
03F6 - 03F6 Intel 82371AB/EB PCI Bus Master IDE Controller
03F7 - 03F7 Standard Floppy Disk Controller
03F8 - 03FF Communications Port (COM1)
03D0 - 04D1 Motherboard Resources
0CF8 - 0CFF PCI Bus
1000 - 103F Motherboard Resources
1040 - 104F Motherboard Resources
1050 - 105F Intel 82371AB/EB PCI Bus Master IDE Controller
1060 - 107F Intel 82371AB/EB PCI to USB Universal Host Controller
1080 - 10FF PCI Fast Ethernet DEC 21143 Based Adapter
1400 - 14FF PCI Communication Device
1800 - 1807 PCI Communication Device
S y s t e m Me m o ry Ca t a lo g
MemoryAddress
Device
00000000 -0009FFFF
System Board Extension for PnP BIOS
000A0000 -000AFFFF
NeoMagic NMG5 Graphics Controller
000B0000 -000BFFFF
NeoMagic NMG5 Graphics Controller
000C0000 -000CBFFF
NeoMagic NMG5 Graphics Controller
000E4000 -000FFFFF
System Board Extension for PnP BIOS
00100000 -
03FFFFFF
System Board Extension for PnP BIOS
04000000 -04000FFF
Texas Instruments PCI-1225 CardBus Controller
04001000 -04001FFF
Texas Instruments PCI-1225 CardBus Controller
F4000000 -F40000FF
PCI Communication Device
F4000400 -F40007FF
PCI Fast Ethernet DEC 21143 Based Adapter
F4100000 -F41FFFFF
NeoMagic NMG5 Graphics Controller
F4100000 -F47FFFFF
Intel 82443BX Pentium(r) II Processor to AGPController
F4200000 -F42FFFFF
PCI Multimedia Audio Device
F4400000 -F47FFFFF
NeoMagic NMG5 Graphics Controller
F4C00000 -F4FFFFFF
PCI Multimedia Audio Device
F4C00000 -F5FFFFFF
Intel 82443BX Pentium(r) II Processor to AGPController
F5000000 -F5FFFFFF NeoMagic NMG5 Graphics Controller
F8000000 -FBFFFFFF
Intel 82443BX Pentium(r) II Processor to PCIBridge (with GART support)
FFF80000 -FFFFFFFF
Motherboard Resources
D is p la y I n f o r m a t io n
12.1 in TFT Display
U.S. Metric
12.1 in TFTDimensions
HeightDepthWidth
1.1 in11.6 in9.2"
234mm294.7mm29mm
13.3 in TFTDimensions
HeightDepthWidth
1.2 in11.6 in9.2 in
234mm294.7mm30.5mm
M e m o r y Ex p a n s io n ( N o t A p p l ic a b le in t h is Fo r m Fa c t o r)
D is k e t t e D riv e
Storage Drives
3.5 in Drive LS-120 Drive
Capacity per Diskette (High/Low)Low 720KBHigh 1.44MB
InformationNot Applicable
Diskette Size 3.5 in
Number of LED Indicators(Read/Write)
1
Number of Drives Supported 1
Drive Rotation (rpm) 360
Low 31
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Maintenance & Service GuidePresario 1900 Series
Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,
1922, 1925, 1926, 1927, 1928, 1929, and 1930
Before You Begin Specifications Parts Catalog
Removal Sequence Troubleshooting Battery Operations
Product Description Pin Assignments Index
Specifications
S y s t e m I / O Ad d re s s
I/O Address System Function (Shipping Configuration)
0000 - 000F Direct Memory Access Controller
0020 - 0021 Programmable Interrupt Controller
0040 - 0043 System Timer
0060 - 0060 Standard 101/102-Key or Microsoft Natural Keyboard
0061 - 0061 System Speaker
0064 - 0064 Standard 101/102-Key or Microsoft Natural Keyboard
0070 - 0071 System CMOS/Real Time Clock
0081 - 008F Direct Memory Access Controller
00A0 - 00A1 Programmable Interrupt Controller
00C0 - 00DF Direct Memory Access Controller
00E0 - 00E1 Motherboard Resources
00F0 - 00FF Numeric Data Processor
0170 - 0177 Intel 82371AB/EB PCI Bus Master IDE Controller
01F0 - 01F7 Intel 82371AB/EB PCI Bus Master IDE Controller
0201 - 0201 Gameport Joystick
0274 - 0277 IO Read Data Port for ISA Plug and Play Enumerator
0376 - 0376 Intel 82371AB/EB PCI Bus Master IDE Controller
0378 - 037F Printer Port (LPT1)
03B0 - 03BB NeoMagic NMG5 Graphics Controller
03C0 - 03DF NeoMagic NMG5 Graphics Controller
03F0 - 03F5 Standard Floppy Disk Controller
03F6 - 03F6 Intel 82371AB/EB PCI Bus Master IDE Controller
03F7 - 03F7 Standard Floppy Disk Controller
03F8 - 03FF Communications Port (COM1)
03D0 - 04D1 Motherboard Resources
0CF8 - 0CFF PCI Bus
1000 - 103F Motherboard Resources
1040 - 104F Motherboard Resources
1050 - 105F Intel 82371AB/EB PCI Bus Master IDE Controller
1060 - 107F Intel 82371AB/EB PCI to USB Universal Host Controller
1080 - 10FF PCI Fast Ethernet DEC 21143 Based Adapter
1400 - 14FF PCI Communication Device
1800 - 1807 PCI Communication Device
S y s t e m Me m o ry Ca t a lo g
Memory Address Device
00000000 - 0009FFFF System board extension for PnP BIOS
000A0000 - 000AFFFF NeoMagic NMG5 Graphics Controller
000B0000 - 000BFFFF NeoMagic NMG5 Graphics Controller
000C0000 - 000CBFFF NeoMagic NMG5 Graphics Controller
000E4000 - 000FFFFF System Board Extension for PnP BIOS
00100000 - 03FFFFFF System Board Extension for PnP BIOS
04000000 - 04000FFF Texas Instruments PCI-1225 CardBus Controller
04001000 - 04001FFF Texas Instruments PCI-1225 CardBus Controller
F4000000 - F40000FF PCI Communication Device
F4000400 - F40007FF PCI Fast Ethernet DEC 21143 Based Adapter
F4100000 - F41FFFFF NeoMagic NMG5 Graphics Controller
F4100000 - F47FFFFF Intel 82443BX Pentium(r) II Processor to AGPController
F4200000 - F42FFFFF PCI Multimedia Audio Device
F4400000 - F47FFFFF NeoMagic NMG5 Graphics Controller
F4C00000 - F4FFFFFF PCI Multimedia Audio Device
F4C00000 - F5FFFFFF Intel 82443BX Pentium(r) II Processor to AGPController
F5000000 - F5FFFFFF NeoMagic NMG5 Graphics Controller
F8000000 - FBFFFFFF Intel 82443BX Pentium(r) II Processor to PCIBridge (with GART Support)
FFF80000 - FFFFFFFF Motherboard Resources
D is p la y I n f o r m a t i o n
12.1 in TFT Display
U.S. Metric
12.1 in TFTDimensions
HeightDepthWidth
1.1 in11.6 in9.2 in
234mm294.7mm29mm
13.3 in TFTDimensions
Height
DepthWidth
1.2 in11.6 in
9.2 in
234mm294.7mm
30.5mm
D is k e t t e D r iv e
Storage Drives
3.5 in Dr ive LS-120 Drive
Capacity per Diskette(High/Low)
Low 720KBHigh 1.44MB
InformationNot Applicable
Diskette Size 3.5 in
Number of LED Indicators(Read/Write)
1
Number of Drives Supported 1
Drive Rotation (rpm) 360
Transfer Rate (Kbps/Sec) Low 31High 62
Bytes per Sector 512
Sectors per Track (High/Low)Low 9High 18
Access Times
Track-to-Track (ms)Head Setting (ms) 3ms
15ms
Cylinders (High/Low) Not Available
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Maintenance & Service GuidePresario 1900 Series
Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,1922, 1925, 1926, 1927, 1928, 1929, and 1930
Before You Begin Specifications Parts Catalog
Removal Sequence Troubleshooting Battery Operations
Product Description Pin Assignments Index
I llustrated Parts Catalog
System Unit
Boards
Display Assembly
Mass StorageDevices
MiscellaneousHardware andPlastics Kit
MiscellaneousHardware andPlastics Wedge Kit
MiscellaneousParts
Documentation
and Software
Configure toOrder
S y s t e m Un it
Description
1. Keyboards
U.S.
331419-001(or)140676-001(or)159404-001
International
331419-002(or)
140676-002(or)159404-002
UnitedKingdom
331419-031(or)159404-031
Asia Pacific
331419-
AA1People'sRepublic ofChina
331419-371
France
331419-051(or)140676-051(or)159404-
051
Latin America331419-161
Japan
331419-291(or)159404-291
Italy
140676-061(or)159404-061
2. Upper CPU Coverw/Palmrest andTouchPad SparePart No: 331423-001 or 140678-001or 159400-001
3. Speaker Assemblyw/Cable Spare PartNo: 331420-001
4. Battery Pack - Liion Spare Part No:386500-001 or140664-001
5.CPU Base AssemblyEnclosure with SystemBoard and SpeakerAssembly, (BottomPlastics)Spare Part No: 331414-001 or 140671-001 or159398-001 (model1930)
6. CPU Base AssemblyEnclosure with Shield,(Bottom Plastics -Not Shown)Spare Part No: 331421-001 or 140679-001
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Maintenance & Service GuidePresario 1900 Series
Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,1922, 1925, 1926, 1927, 1928, 1929, and 1930
Before You Begin Specifications Parts Catalog
Removal Sequence Troubleshooting Battery Operations
Product Description Pin Assignments Index
I llustrated Parts Catalog
System Unit
Boards
Display Assembly
Mass Storage
Devices
Miscellaneous
Hardware and
Plastics Kit
Miscellaneous
Hardware and
Plastics Wedge Kit
Miscellaneous
Parts
Documentation
and Software
Configure to Order
B o a r d s
Description SparePartNumber
1. Processors
PentiumII/266-MHzw/512 Cache
400779-001
PentiumII/300-MHzw/512 Cache
400780-001
Celeron/266-MHz w/128KCache
102422-001
Celeron/300-MHz w/128KCache
102268-001
PentiumII/333-MHzw/256K Cache
107999-001 or159864-001
Celeron II/333-MHz w/128Cache
140670-001
Celeron II/400-MHz w/128KCache
159865-001
PentiumII/300-MHz
w/512 Cache
140667-001
Celeron II/300-MHz w/128Cache
140668-001
Pentium 333MKz w/256cCache
107999-001 or159864-001
Celeron II/333MHz w/128Cache
14670-001
Celeron II/400MHz w/128
Cache
159865-001
PentiumII/366-MHzw/256 Cache
159866-001
PentiumII/400-MHzw/256 Cache
159445-001
2. HardDrive/Battery
Charger Boardw/RTC Battery
331412-001
3. Modemw/Shield, 56.0Kbps Data/Fax
331429-001
4. Low VoltageDifferentialSignal Board
(For 13.3'Display Panel)
331411-001or
159396-001
5. VoltageConverter Board
331413-001
6. PC CardAssembly
102123-001
7. Fan Assembly
(Not Shown)
331410-
001 or159403-001
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Maintenance & Service GuidePresario 1900 Series
Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,1922, 1925, 1926, 1927, 1928, 1929, and 1930
Before You Begin Specifications Parts Catalog
Removal Sequence Troubleshooting Battery Operations
Product Description Pin Assignments Index
I llustrated Parts Catalog
System Unit
Boards
DisplayAssembly
Mass Storage
Devices
Miscellaneous
Hardware and
Plastics Kit
Miscellaneous
Hardware and
Plastics Wedge
Ki t
Miscellaneous
Parts
Documentation
and Software
Configure to
Order
D is p la y P a n e l
A s s e m b ly
Description SparePartNumber
DisplayPanelAssemblyw/Cable13.3 inchTFT
331409-001 or140666-001
DisplayPanel
Assemblyw/Cable andConnector,12.1 inchTFT
331408-001 or
140665-001
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Maintenance & Service GuidePresario 1900 Series
Mode ls: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,1922, 1925, 1926, 1927, 1928, 1929, and 1930
Before You Begin Specifications Parts Catalog
Removal Sequence Troubleshooting Battery Operations
Product Description Pin Assignments Index
I llustrated Parts Catalog
System Unit
Boards
Display
Assembly
Mass StorageDevices
MiscellaneousHardware and
Plastics Kit
Miscellaneous
Hardware and
Plastics W edge
Kit
Miscellaneous
Parts
Documentation
and SoftwareConfigure to
Order
Ma s s S t o r a g e
D e v i c e s
DescriptionModel
No.
SparePart
Number
1. Diskette
Drivew/cable1.44 MB,3.5 inch
1905,
1906,1910,1915,1919&1920
331428-
001
2. LS-120Drive
1922&1925
TDB
3. Hard
Drive
4.8-GB
6.4-GB
4.0-GB
6.4-GB
10-GB
1905,
1906,1910,1915,1919,&1920
1905,1906,1910,1915,1919,&1920
1922&1925
1922&
1925
1922&1925
331415-001
331416-001
140672-001
140673-001
140674-001
DVD Drivew/InterfaceConnector
1905,1906,1910,1915,1919,&1920
1922&1925
331427-001
140682-002
24X CDDrivew/cable
1905,1906,1910,1915,
1919,&1920
1922&1925
102122-001
TBD
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Maintenance & Service GuidePresario 1900 Series
Mode ls: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,1922, 1925, 1926, 1927, 1928, 1929, and 1930
Before You Begin Specifications Parts Catalog
Removal Sequence Troubleshooting Battery Operations
Product Description Pin Assignments Index
I llustrated Parts Catalog
System Unit
Boards
Display
Assembly
Mass Storage
Devices
MiscellaneousHardwareand PlasticsKit
Miscellaneous
Hardware and
Plastics W edge
Ki t
Miscellaneous
Parts
Documentationand Software
Configure to Order
M i s c e l l a n e o u s
H a rd w a r e a n d
P la s t i c s K it
Spare Part Number:
331418-001(Models: 1905,1906, 1910, 1915,1919, & 1920)
Spare Part Number:140675-001(Models: 1900T,1922, 1925, 1926,1927, 1928, 1929,1930)
Description Quantity
1. DisplayPanelAssemblyHinge Cover,Left
1 each
2. DisplayPanel
AssemblyHinge Cover,Right
1 each
3. CD/DVDGuide Rails
1 each
4. PC CardPlaceholder
1 each
5. DisplayPanelAssemblyHinge Frame(Left andRight)
1 each
6.Heatspreaderwith ThermalPad
2 each
12.1 inchFPC SupportBracket(Not Shown)
1 each
KeyboardEject Latch(Not Shown)
1 each
TouchPad
Switch (NotShown)
1 each
Scroll ButtonSwitch (NotShown)
1 each
Battery EjectLatch (NotShown)
1 each
DisplayScrew HoleCovers(Not Shown)
4 each
Battery KnobSpring Coil(Not Shown)
2 each
VolumeSwitch Knob(Not Shown)
1 each
Display EjectLatch (NotShown)
1 each
RJ11 JackAssembly(Not Shown)
1 each
Rubber Feet(Not Shown) 2 each
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Maintenance & Service GuidePresario 1900 Series
Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,1922, 1925, 1926, 1927, 1928, 1929, and 1930
Before You Begin Specifications Parts Catalog
Removal Sequence Troubleshooting Battery Operations
Product Description Pin Assignments Index
I llustrated Parts Catalog
System Unit
Boards
Display
Assembly
Mass Storage
Devices
Miscellaneous
Hardware
and P lastics
Kit
MiscellaneousHardware andPlastics WedgeKi t
Miscellaneous
Parts
Documentation
and SoftwareConfigure to
Order
M is c e lla n e o u s H a rd w a r e
a n d P la s t i c s W e d g e K it
Spare Part Numbers:331424-001(Models: 1905, 1906,
1910, 1915, 1919, &1920)
Spare Part Numbers:140680-001(Models: 1900T, 1922,1925, 1926, 1927,1928, 1929, 1930)
Description Quantity
1. DisketteDrive Shield 1 each
2. AlignmentPins (Left andRight)
2 each
3. DVD DriveShield
1 each
4. EjectMechanismAssemblyw/Springs(Left andRight)
2 each
5. RubberFeet
4 each
6. Wedge toPortReplicatorInterfaceBoard
1 each
7.ReinforcementBracket
1 each
Top andBottomWedge Cover(Not Shown)
331425-001
System toWedgeInterfaceBoard
1 each
Eject PlungerKnobs (NotShown)
2 each
PlungerSpring Coil(Not Shown)
2 each
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Maintenance & Service GuidePresario 1900 Series
Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,1922, 1925, 1926, 1927, 1928, 1929, and 1930
Before You Begin Specifications Parts Catalog
Removal Sequence Troubleshooting Battery Operations
Product Description Pin Assignments Index
I llustrated Parts Catalog
System Unit
Boards
Display
Assembly
Mass Storage
DevicesMiscellaneous
Hardware and
Plastics Kit
Miscellaneous
Hardware and
Plastics Wedge
Kit
MiscellaneousParts
Documentationand Software
Configure to
Order
M is c e lla n e o u s P a r t s
Descr iption SparePartNumber
1. AC 45WAdapter
358976-001
2. Integrated10/100BaseTEthernet PortReplicator
331407-001 or140663-001
MiscellaneousScrew Kit(Not Shown)
331422-001or159399-
001Y CableAssembly(Not Shown)
102422-001
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Maintenance & Service GuidePresario 1900 Series
Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,1922, 1925, 1926, 1927, 1928, 1929, and 1930
Before You Begin Specifications Parts Catalog
Removal Sequence Troubleshooting Battery Operations
Product Description Pin Assignments Index
I llustrated Parts Catalog
Do c u m e n t a t io n a n d S o f t w a re
System Unit
Boards
Display
Assembly
Mass Storage
Devices
Miscellaneous
Hardware and
Plastics Kit
Miscellaneous
Hardware and
Plastics Wedge
Ki t
Miscellaneous
Parts
Documentation
and Software
Configure to
Order
Description Spare Part Number
Quick Restore CD 1
US/PRMexicoAPDPRCKoreaAUSJapanUKFranceItalyBelgium
122314-001122314-
161122314-371122314-AA1122314-AD1122314-371122314-291122314-031122314-
051122314-061122314-AK1
Quick Restore CD 2
Belgium
122314-KK1
Reference Guide
Quick Reference Guide Not Available
QuickFind for Windows, North America, Latin America, AsiaPacific
Not Available
QuickFind for Windows, Europe, Middle East, Africa Not Available
QuickFind is updated monthly. To complete the QuickFind part number, add thesuffix from the table below for the desired month. If you do not specify the 3-digit suffix, the default is the current month in which the order is placed.
QuickFind Part Number SuffixSuffix Month Suffix Month
-001 January -007 July
-002 February -008 August
-003 March -009 September
-004 April -010 October
-005 May -011 November
-006 June -012 December
117894-001 US/PR
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Maintenance & Service GuidePresario 1900 Series
Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,1922, 1925, 1926, 1927, 1928, 1929, and 1930
Before You Begin Specifications Parts Catalog
Removal Sequence Troubleshooting Battery Operations
Product Description Pin Assignments Index
Product Description
Models andFeatures
Controls andLights
Status Panel
Left SideComponents
Right SideComponents
Bottom ofUnit
Left Sideand TopWedgeComponents
Right SideWedgeComponents
RearConnectors
PortReplicatorConnectors
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Maintenance & Service GuidePresario 1900 Series
Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,1922, 1925, 1926, 1927, 1928, 1929, and 1930
Before You Begin Specifications Parts Catalog
Removal Sequence Troubleshooting Battery Operations
Product Description Pin Assignments Index
Models and Features
Models andFeatures
Status Panel
Left Side
Components
Right Side
Components
Bottom of
Unit
Left Sideand Top
Wedge
Components
Right Side
Wedge
Components
Rear
Connectors
Port
Replicator
Connectors
Port
Replicator
Components
Power
Management
Compaq Discovery 1900 Series Portable ComputerModels
Model1926, 1927, and1928
Model1929 and 1930
Display 12. 1" TFT or 13.3TFT
13. 3" TFT
Processor Intel Celeron/400-MHzw/128K Cache
orPentium II/333-MHzw/256K Cache
Pentium II/366-MHzw/256K Cacheor
Intel Celeron/400-MHz w/128K CacheorIntel Celeron/433-MHz w/128K Cache
Hard Drive 4.8-GB or 6.4-GB 4.8-GB or 6.4-GB
Modem 56.0 Kbps PCIData/Fax
56.0 Kbps PCIData/Fax or
InternationalCD Drive 4X DVD or 24X CD-
ROM4X DVD
Configure To Order Features (CTOs)
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Maintenance & Service GuidePresario 1900 Series
Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,
1922, 1925, 1926, 1927, 1928, 1929, and 1930
Before You Begin Specifications Parts Catalog
Removal Sequence Troubleshooting Battery Operations
Product Description Pin A ssignments Index
Product Description
Models and
Features
Controlsand Lights
Status Panel
Left SideComponents
Right SideComponents
Bottom ofUnit
Left Sideand TopWedgeComponents
Right SideWedgeComponents
RearConnectors
PortReplicator
Connectors
PortReplicatorComponents
PowerManagement
Co n t r o ls a n d Lig h t s
Front of Unit
1. Display 9. TouchPad
2.Backlight
SwitchButton
10. LeftTouchPad
Button
3.InstantInternetAccessButton
11. Power(On/Off)Light
4.InstantSearchButton
12. Scroll(Up/Down)Button
5. Power(On/Off)Button
13. BatteryCharge Light
6. InstantE-Commerce(orFavoriteWeb site)Button
14. DisplayPanel ReleaseButton
7. InstantE-MailButton
15. RightTouchPadButton
8.Keyboard
16.IntegratedSpeakers
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Maintenance & Service GuidePresario 1900 Series
Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,1922, 1925, 1926, 1927, 1928, 1929, and 1930
Before You Begin Specifications Parts Catalog
Removal Sequence Troubleshooting Battery Operations
Product Description Pin Assignments Index
Product Description
Models andFeatures
Controls andLights
Status Panel
Left SideComponents
Right SideComponents
Bottom ofUnit
Left Sideand TopWedgeComponents
Right Side
WedgeComponents
RearConnectors
PortReplicatorConnectors
PortReplicatorComponents
PowerManagement
S t a t u s
P a n e l
L igh t s
1. ACAdapterLight
2. NumLock
Light3. CapsLockLight
4. ScrollLockLight
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Maintenance & Service GuidePresario 1900 Series
Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,1922, 1925, 1926, 1927, 1928, 1929, and 1930
Before You Begin Specifications Parts Catalog
Removal Sequence Troubleshooting Battery Operations
Product Description Pin Assignments Index
Product Description
Models andFeatures
Controls andLights
Status PanelLeft SideComponents
Right SideComponents
Bottom ofUnit
Left Side andTop WedgeComponents
Right SideWedgeComponents
RearConnectors
PortReplicator
Connectors
Port
Replicator
Components
Power
Management
Le f t S id e
Co m p o n e n t s
1. SecurityLock
2. Air Vent
3. PC CardSlots
4. PC CardEject Levers
5. Hard Drive
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Maintenance & Service GuidePresario 1900 Series
Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,
1922, 1925, 1926, 1927, 1928, 1929, and 1930
Before You Begin Specifications Parts Catalog
Removal Sequence Troubleshooting Battery Operations
Product Description Pin Assignments Index
Product Description
Models andFeatures
Controls andLights
Status Panel
Left SideComponents
Right SideComponents
Bottom ofUnit
Left Sideand TopWedgeComponents
Right Side
WedgeComponents
RearConnectors
PortReplicatorConnectors
PortReplicatorComponents
PowerManagement
B o t t o m
o f U n it
1. WedgeInterfaceConnector
2.KeyboardEjectSwitch
3. BatteryReleaseLever
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Maintenance & Service GuidePresario 1900 Series
Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,1922, 1925, 1926, 1927, 1928, 1929, and 1930
Before You Begin Specifications Parts Catalog
Removal Sequence Troubleshooting Battery Operations
Product Description Pin Assignments Index
Product Description
Models andFeatures
Controls and
LightsStatus Panel
Left SideComponents
Right SideComponents
Bottom ofUnit
Left Sideand TopWedgeComponents
Right SideWedgeComponents
RearConnectors
PortReplicatorConnectors
PortReplicatorComponents
PowerManagement
W e d g e
Co m p o n e n t s
Left Side andTop
Componentsof the
RemovableDrive Wedge
1. DVD Driveor CD ROMDrive
2. WedgeRelease Button
3. System toWedgeInterfaceConnector
4. AlignmentPins
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Maintenance & Service GuidePresario 1900 Series
Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,1922, 1925, 1926, 1927, 1928, 1929, and 1930
Before You Begin Specifications Parts Catalog
Removal Sequence Troubleshooting Battery Operations
Product Description Pin Assignments Index
Product Description
Models andFeatures
Controls andLights
Status PanelLeft SideComponents
Right SideComponents
Bottom ofUnit
Left Side andTop WedgeComponents
Right SideWedgeComponents
RearConnectors
PortReplicatorConnectors
PortReplicatorComponents
PowerManagement
W e d g e
Co m p o n e n t s
Right SideComponents of
the RemovableDrive Wedge
1. WedgeReleaseButton
2. DisketteDrive or LS-120 DriveSlot
3. DisketteDrive or LS-120 DriveEjectButton
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Maintenance & Service GuidePresario 1900 Series
Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,1922, 1925, 1926, 1927, 1928, 1929, and 1930
Before You Begin Specifications Parts Catalog
Removal Sequence Troubleshooting Battery Operations
Product Description Pin Assignments Index
Product Description
Models andFeatures
Controls andLights
Status Panel
Left SideComponents
Right SideComponents
Bottom ofUnit
Left Sideand TopWedgeComponents
Right SideWedgeComponents
RearConnectors
PortReplicatorConnectors
PortReplicatorComponents
PowerManagement
R e a r
C o n n e c t o r s
1. Modem Jack
2. USB Port
3.Keyboard/MousePort
4. Serial Port
5. Parallel Port
6. ExternalMonitor Port
7. AC Adapter
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Maintenance & Service GuidePresario 1900 Series
Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,1922, 1925, 1926, 1927, 1928, 1929, and 1930
Before You Begin Specifications Parts Catalog
Removal Sequence Troubleshooting Battery Operations
Product Description Pin Assignments Index
Product Description
Models andFeatures
Controls andLights
Status Panel
Left Side
ComponentsRight SideComponents
Bottom ofUnit
Left Sideand TopWedgeComponents
Right SideWedgeComponents
RearConnectors
PortReplicatorConnectors
Port
ReplicatorComponents
PowerManagement
Integrated 10/ 100BaseTEthernet Port Replicator
Connectors
1. Keyboard/Mouse
2. AC Adapter
3. Serial Port
4. Parallel Port5. External Monitor Port
6. Local Area Network (LAN)
7. Keyboard/Mouse
8. USB Port
9. MIDI/Game Pad/Joystick Port
10. Security Lock
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Maintenance & Service GuidePresario 1900 Series
Mode ls: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,1922, 1925, 1926, 1927, 1928, 1929, and 1930
Before You Begin Specifications Parts Catalog
Removal Sequence Troubleshooting Battery Operations
Product Description Pin Assignments Index
Product Description
Models and
Features
Controls andLights
Status Panel
Left SideComponents
Right SideComponents
Bottom ofUnit
Left Side andTop WedgeComponents
Right SideWedgeComponents
RearConnectors
PortReplicatorConnectors
PortReplicatorComponents
PowerManagement
Po w e r Ma n a g e m e n t S e t t in g s
Compaq Presario 1900 Series Portable Computers are equipped with Advanced Power Management (APM). Thismanagement system allows you to conserve battery power and customize the power saving settings to suit your individualneeds.
q Power Management Settingsq Sleepq Hibernationq Rebooting After a Lockupq Servicing Your Computer - Full Off Mode
Depending on your patterns of computer use, you can set different conditions, or Power Schemes,under which the computer will go into Sleep mode. The optional settings are Home/ Office Desk ,Portable/ Laptop , and Always On .
From the default settings, you can change the following settings.
q When the computer goes into Sleep (Standby) modeq When the screen times out and goes blankq When the hard drive slows down
NOTE: The setting for the hard drive must be less than or equal to the setting for the computer.
IMPORTANT:If you are connected to a network, Compaq recommends you set System Standby toNever .
S l e e p
Sleep mode is a low power mode, also referred to as Standby mode.
CAUTION: While in Sleep mode, your computer will maintain system information and open
files. Unsaved information will be lost if you turn off your system prior to system wake-up, or if you lose power while using the AC adapter .
H ib e r n a t io n M o d e
Hibernation mode occurs by pressing the Power button once. Your computer saves the content of your computermemory to the hard drive. This is followed by the computer turning off.
The following table shows the conditions and indicators for getting in and out of the various power modes: Sleep,Hibernation, and Off.
Mode To Start To End Indicators
Sleep Manual - Fn+F4key combination
Press any key ormove themouse
Flashing Power LED
Time-Out Default -15 minutes. If usingbattery power, systemwill not go to Sleep ifon AC power
Hibernate Manual - Press Power
Button once
Press Power
button once
No Power LED,
blank screen
Time Out Default - iflow battery or after 1hour of Sleep (systemwill not Hibernate if onAC power)
Off Perform normalWindows shutdownusing the Startbutton, or press andhold down the Powerbutton for 4 seconds
Press Powerbutton once
No Power LED,blank screen
R e b o o t i n g A f t e r a Lo c k u p
Occasionally you may encounter a non-working keyboard or a locked screen. To restart yourcomputer, press and hold down the Power button for at least four seconds. This will cause a manual shutdown. Press thePower button once to start the computer.
If the computer still does not restart, follow these steps:
1. Press the Power button and hold it for four seconds to shut the computer down.
2. Remove the battery and unplug the AC power for at least 30 seconds.
3. Reinsert the battery or reconnect AC power and press the Power button once to restart.
Fu ll O f f ( M a in P o w e r Of f ) M o d e
If you need to install or replace components in your computer, you must turn the computer offcompletely . Follow theinstructions above for putting the computer into Standard Off mode. Unplug the computer electrical cord from the outletand remove the battery if installed.
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Maintenance & Service GuidePresario 1900 Series
Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,1922, 1925, 1926, 1927, 1928, 1929, and 1930
Before You Begin Specifications Parts Catalog
Removal Sequence Troubleshooting Battery Operations
Product Description Pin Assignments Index
Removal and Replacement Procedures
This section explains the removal and replacement procedures for the computer.
Electrostatic
DischargeServiceConsiderations
Cables andConnectors
Preparing theComputer for
DisassemblyBattery Pack
Hard Drive
Keyboard
MemoryModule
Modem
Heatspreader
Processor
Display PanelAssembly
Upper CPUCover withPalmrest and
TouchPad
Hard Drive/BatteryCharger Board
ConverterBoard
Low Voltage
DifferentialSignal Board
Fan Assembly
System Board
SpeakerAssembly
Disassemblingthe Wedge
DVD or CDDrive
System toWedgeInterfaceBoard
Diskette Drive
Wedge to PortReplicatorInterfaceBoard
How to useProcessor Jig
S e r i a l
N u m b e r
Report thecomputerserialnumber toCompaqwhenrequesting
informationor orderingspareparts. Theserialnumber islocated onbottom ofunit.
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Maintenance & Service GuidePresario 1900 Series
Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,1922, 1925, 1926, 1927, 1928, 1929, and 1930
Before You Begin Specifications Parts Catalog
Removal Sequence Troubleshooting Battery Operations
Product Description Pin Assignments Index
Removal and Replacement Procedures
Ele c t r o s t a t ic D is c h a r g e
A sudden discharge of static electricity from a finger or other conductor candestroy static-sensitive devices or microcircuitry. Often the spark is neitherfelt nor heard, but damage occurs. An electronic device exposed toelectrostatic discharge (ESD) may not be affected at all and will workperfectly throughout a normal cycle. Although it may function normally for awhile, then degrade in the internal layers, reducing its life expectancy.
Networks built into many integrated circuits provide some protection, but inmany cases, the discharge contains enough power to alter device parameters
or melt silicon junctions.
Ge n e ra t in g S t a t ic
The table shows how different activities generate static electricity at differentelectrostatic voltage levels.
Typical Electrostatic Voltages
Relative Humidity
Event 10% 40% 55%
Walking across carpet 35,000 V 15,000 V 7,500 V
Walking across vinyl floor 12,000 V 5,000 V 3,000 V
Motions of bench worker 6,000 V 800 V 400 V
Removing DIPS from plastic tubes 2,000 V 700 V 400 V
Removing DIPS from vinyl trays 11,500 V 4,000 V 2,000 V
Removing DIPS from Styrofoam 14,500 V 5,000 V 3,500 V
Removing bubble pack from PCBs 26,000 V 20,000 V 7,000 V
Packing PCBs in foam-lined box 21,000 V 11,000 V 5,000 V
NOTE: 700 volts can degrade a product.
Return to Removal & Replacement Procedures
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Maintenance & Service GuidePresario 1900 Series
Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,1922, 1925, 1926, 1927, 1928, 1929, and 1930
Before You Begin Specifications Parts Catalog
Removal Sequence Troubleshooting Battery Operations
Product Description Pin Assignments Index
Removal and Replcement Procedures
S e rv ic e Co n s id e ra t io n s
Listed below are some of the considerations that you should keep in mindduring the disassembly and assembly of the computer.
T o o l a n d S o f t w a re R e q u ire m e n t s
To service the computer, you need the following:
q 5 millimeter nut drivers (for screwlocks and standoffs)q Small, Phillips (P-Zero) screwdriver
q Small, standard screwdriverq Small, pair of tweezersq Diagnostics software
S c re w s
The screws used in the computer are not interchangeable. If an incorrectscrew is used during the reassembly process, it can damage the unit. Compaqstrongly recommends that all screws removed during disassembly be kept
with the part that was removed, then returned to their proper locations.
IMPORTANT:As each subassembly is removed from the computer, it should beplaced away from the work area to prevent damage.
Return to Removal & Replacement Procedures
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Maintenance & Service GuidePresario 1900 Series
Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,1922, 1925, 1926, 1927, 1928, 1929, and 1930
Before You Begin Specifications Parts Catalog
Removal Sequence Troubleshooting Battery Operations
Product Description Pin Assignments Index
Removal and Replacement Procedures
Ca b le s a n d Co n n e c t o rs
Most cables used throughout the unit are ribbon cables. Cables must be handled withextreme care to prevent damage. Apply only the tension required to seat or unseat thecables during insertion or removal from the connector. Handle cables by the connector
whenever possible. In all cases, avoid bending, twisting, or tearing the cables, andensure that the cables are routed in such a way that they cannot be caught or snaggedby parts being removed or replaced.
C a b l e s
Use the following precautions when handling cables to avoid damage to the cable orcomputer:
q Always handle cables by their connectors.q Avoid bending, twisting, or pulling on the cables.q Apply minimum required force when seating or unseating the cables from their
connectors.q Place the cables in such a manner that they cannot be caught or snagged by parts being
removed or replaced.q Handle flex cables with extreme care; they can tear easily.
CAUTION: When serving these computers, ensure that cables are placed intheir proper location during the reassembly process. Improper cable placementcan cause severe damage to the unit.
S e le c t t h e d e s ire d i llu s t ra t io n
Removing a cable from a ZIF Connector.
The cable position for the speaker assembly.
P la s t i c P a r t s
Plastic parts can be damaged by the use of excessive force during disassembly andreassembly. When handling the plastic parts, use care. Apply pressure only at thepoints designated in the maintenance instructions.
Return to Removal & Replacement P rocedures
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Maintenance & Service GuidePresario 1900 Series
Models: 1900T, 1905, 1906, 1910, 1915, 1919 , 1920,1922, 1925, 1926, 1927, 1928, 1929, and 1930
Before You Begin Specifications Parts Catalog
Removal Sequence Troubleshooting Battery Operations
Product Description Pin A ssignments Index
Removal and Replacement Procedures
ElectrostaticDischarge
ServiceConsiderations
Cables andConnectors
PreparingtheComputerfo rDisassembly
Battery Pack
Hard Drive
Keyboard
MemoryModule
Modem
Heatspreader
Processor
Display PanelAssembly
Upper CPUCover withPalmrest andTouchPad
Hard Drive/BatteryCharger Board
Converter
BoardLow VoltageDifferentialSignal Board
Fan Assembly
System Board
SpeakerAssembly
Disassemblingthe Wedge
DVD or CDDrive
System toWedgeInterfaceBoard
Diskette Drive
Wedge to PortReplicatorInterface
BoardHow to use
Processor
Jig
P re p a r in g t h e Co m p u t e r f o r Dis a s s e m b ly
Before beginning removal and replacement procedures, complete the following procedures:
1. Disconnect AC power and any external devices.
2. Remove the battery pack.
3. Remove any PC Cards.
4. Remove the wedge.
IMPORTANT:The battery pack should be removed before performing any internal maintenance onthe computer.
WARNING: Metal objects can damage the battery pack as well as the battery contacts inthe battery compartment. To prevent damage, do not allow metal objects to touch thebattery contacts. Place only the battery pack for the Compaq Presario 1900 SeriesPortable Computers into the battery compartment. Do not force the battery pack intothe bay if insertion does not occur easily.
CAUTION: Do not crush, puncture, or incinerate the battery pack. Do not open a batterypack, as this damages the pack, makes it unusable, and exposes potentially harmfulbattery components. There are no field-serviceable parts located inside the battery pack.
NOTE:
The Compaq Presario 1900 Series Portable Computers have several screws of various sizeswhich are not interchangeable. Care must be taken during reassembly to ensure that thecorrect screws are used in their correct location. During removal please keep respectivescrews with their associate sub-assembly.
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Maintenance & Service GuidePresario 1900 Series
Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,1922, 1925, 1926, 1927, 1928, 1929, and 1930
Before You Begin Specifications Parts Catalog
Removal Sequence Troubleshooting Battery Operations
Product Description Pin Assignments Index
Removal and Replacement Procedures
ElectrostaticDischarge
ServiceConsiderations
Cables andConnectors
Preparing theComputer forDisassembly
Battery Pack
Hard Drive
Keyboard
Memory Module
Modem
Heatspreader
Processor
Display PanelAssembly
Upper CPU
Cover withPalmrest andTouchPad
Hard Drive/
Battery
Charger Board
Converter
Board
Low VoltageDifferential
Signal Board
Fan Assembly
System Board
Speaker
Assembly
Disassembling
the Wedge
DVD or CD
Drive
System to
Wedge
Interface
Board
Diskette Drive
Wedge to Port
Replicator
Interface
Board
How to useProcessor Jig
R e m o v in g t h e
B a t t e r y P a c k
To remove thebattery pack,
complete thefollowing steps:
1. Prepare thecomputer for
disassembly.
2. Turn the unitover.
3. Slide the batterypack releasebutton located inthe center of thebottom of theunit.
4. Locate thebattery pack onthe right, placeyour thumb inthe groove, andpull the batterypack forwardfrom the unit.
To replace the batterypack, complete thefollowing step.
Insert the batterypack into thechassis slot
located on theright side of theunit and push in.
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Maintenance & Service GuidePresario 1900 Series
Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,1922, 1925, 1926, 1927, 1928, 1929, and 1930
Before You Begin Specifications Parts Catalog
Removal Sequence Troubleshooting Battery Operations
Product Description Pin Assignments Index
Removal and Replacement Procedures
ElectrostaticDischarge
ServiceConsiderations
Cables andConnectors
Preparing theComputer forDisassembly
Battery Pack
Hard Drive
Keyboard
MemoryModule
Modem
Heatspreader
Processor
Display PanelAssembly
Upper CPUCover withPalmrest andTouchPad
Hard Drive/BatteryCharger Board
ConverterBoard
Low VoltageDifferentialSignal Board
Fan Assembly
System Board
Speaker
AssemblyDisassemblingthe Wedge
DVD or CDDrive
System toWedgeInterface
Board
Diskette Drive
Wedge to PortReplicatorInterfaceBoard
How to useProcessor Jig
R e m o v in g t h e
Hard Dr ive
To remove the harddrive, complete thefollowing steps:
1. Prepare thecomputer fordisassembly.
2. Turn the unitover andremove thescrew (locatedin the rightcorner) fromthe hard drive.
3. Pull the harddrive from thechassis slot.
To replace the harddrive, reverse theprevious procedures.
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Maintenance & Service GuidePresario 1900 Series
Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,1922, 1925, 1926, 1927, 1928, 1929, and 1930
Before You Begin Specifications Parts Catalog
Removal Sequence Troubleshooting Battery Operations
Product Description Pin Assignments Index
Removal and Replacement Procedures
ElectrostaticDischarge
ServiceConsiderations
Cables andConnectors
Preparing theComputer forDisassembly
Battery Pack
Hard Drive
Keyboard
MemoryModule
Modem
Heatspreader
Processor
Display PanelAssembly
Upper CPUCover withPalmrest andTouchPad
Hard Drive/BatteryCharger Board
Converter
BoardLow VoltageDifferentialSignal Board
Fan Assembly
System Board
SpeakerAssembly
Disassemblingthe Wedge
DVD or CDDrive
System toWedgeInterfaceBoard
Diskette Drive
Wedge to PortReplicatorInterfaceBoard
How to useProcessor Jig
R e m o v in g t h e
K e y b o a r d
To remove thekeyboard, complete thefollowing steps:
1. Prepare thecomputer fordisassembly.
2. Partially closethe unit andplace it on itsside.
3. Slide the
keyboard ejectswitch located inthe center of thebottom of theunit to the rightto release thekeyboard.
Next Step
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Maintenance & Service GuidePresario 1900 Series
Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,1922, 1925, 1926, 1927, 1928, 1929, and 1930
Before You Begin Specifications Parts Catalog
Removal Sequence Troubleshooting Battery Operations
Product Description Pin Assignments Index
Removal and Replacement Procedures
R e m o v in g t h e
K e y b o a r d ,
c o n t i n u e d
4. Place the unit right sideup. Gently lift upthe front of thekeyboard usingtweezers.Disconnect theflex cables fromthe ZIF connectors
on the systemboard.
NOTE:
To remove acable from a ZIFconnector, liftboth corners ofthe ZIF
connector andslidesimultaneouslywith constantlight force andthen remove thecable.
5. Lift the keyboardout of the chassis.
To replace thekeyboard, reverse theabove procedures.
Return to Removal andReplacement
Procedures.
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Maintenance & Service GuidePresario 1900 Series
Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,1922, 1925, 1926, 1927, 1928, 1929, and 1930
Before You Begin Specifications Parts Catalog
Removal Sequence Troubleshooting Battery Operations
Product Description Pin Assignments Index
Removal and Replacement Procedures
ElectrostaticDischarge
ServiceConsiderations
Cables andConnectors
Preparing theComputer forDisassembly
Battery Pack
Hard Drive
Keyboard
MemoryModule
Modem
Heatspreader
Processor
Display PanelAssembly
Upper CPUCover withPalmrest andTouchPad
Hard Drive/BatteryCharger Board
ConverterBoard
Low VoltageDifferentialSignal Board
Fan Assembly
System Board
SpeakerAssembly
Disassemblingthe Wedge
DVD or CDDrive
System toWedgeInterfaceBoard
Diskette DriveWedge to PortReplicatorInterfaceBoard
How to useProcessor Jig
R e m o v in g t h e
M e m o r y Mo d u l e
To remove thememory module,
complete thefollowing steps:
1. Prepare thecomputer fordisassembly.
2. Release and liftup thekeyboard.
3. Pull side leversto release thememorymodule, thenunplug thememorymodule fromthe system
board.
To replace thememory module,reverse the previousprocedures.
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Maintenance & Service GuidePresario 1900 Series
Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,1922, 1925, 1926, 1927, 1928, 1929, and 1930
Before You Begin Specifications Parts Catalog
Removal Sequence Troubleshooting Battery Operations
Product Description Pin Assignments Index
Removal and Replacement Procedures
R e m o v in g t h e M o d e m ,
c o n t i n u e d
4. Disconnect the modem cable
from the modem and lift themodem from the chassis.
To replace the modem,reverse the previousprocedures.
Return to Removal &Replacement
Procedures.
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Maintenance & Service GuidePresario 1900 Series
Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,1922, 1925, 1926, 1927, 1928, 1929, and 1930
Before You Begin Specifications Parts Catalog
Removal Sequence Troubleshooting Battery Operations
Product Description Pin Assignments Index
Removal and Replacement Procedures
ElectrostaticDischarge
ServiceConsiderations
Cables andConnectors
Preparing theComputer forDisassembly
Battery Pack
Hard Drive
Keyboard
MemoryModule
Modem
Heatspreader
Processor
Display PanelAssembly
Upper CPU
Cover withPalmrest andTouchPad
Hard Drive/BatteryCharger Board
ConverterBoard
Low VoltageDifferentialSignal Board
Fan Assembly
System Board
SpeakerAssembly
Disassemblingthe Wedge
DVD or CDDrive
System toWedgeInterfaceBoard
Diskette Drive
Wedge to PortReplicatorInterfaceBoard
How to useProcessor Jig
R e m o v in g t h e
H e a t s p r e a d e r
w it h T h e rm a l
Pa d
To remove theheatspreader withthermal pad,complete thefollowing steps:
1. Prepare thecomputer fordisassembly.
2. Release and liftthe keyboard.
3. Remove fourscrews from theheatspreaderwith thermalpad and lift outof the chassis.
NOTE:
Whenreplacing theheatspreader,ensure thatthe thermalpad under theheatspreaderis properlyreplaced.
Next Step
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Maintenance & Service GuidePresario 1900 Series
Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,1922, 1925, 1926, 1927, 1928, 1929, 1930
Before You Begin Specifications Parts Catalog
Removal Sequence Troubleshooting Battery Operations
Product Description Pin Assignments Index
Removal and Replacement Procedures
ElectrostaticDischarge
ServiceConsiderations
Cables andConnectors
Preparing theComputer forDisassembly
Battery Pack
Hard Drive
Keyboard
MemoryModule
Modem
Heatspreader
Processor
Display PanelAssembly
Upper CPU
Cover withPalmrest andTouchPad
Hard Drive/BatteryCharger Board
ConverterBoard
Low Voltage
DifferentialSignal Board
Fan Assembly
System Board
SpeakerAssembly
Disassemblingthe Wedge
DVD or CDDrive
System toWedgeInterfaceBoard
Diskette Drive
Wedge to Port
ReplicatorInterfaceBoard
How to use
Processor
Jig
R e m o v in g t h e
Fa n M o u n t in g
B ra c k e t a n d
D i s c o n n e c t i n g
t h e Fa n Ca b le
To remove theheatspreader withthermal pad,complete thefollowing steps:
1. Prepare thecomputer for
disassembly.
2. Release and liftthe keyboard.
3. Remove theheatspreaderwith thermalpad.
4. Remove themodem cover.
5. Remove twoscrews from the
fan mountingbracket,disconnectfan cable, andlift out ofchassis.
To replace theheatspreader withthermal pad, reversethe previousprocedures.
Return to RemovalSequence Index
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Maintenance & Service GuidePresario 1900 Series
Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,1922, 1925, 1926, 1927, 1928, 1929, and 1930
Before You Begin Specifications Parts Catalog
Removal Sequence Troubleshooting Battery Operations
Product Description Pin Assignments Index
Removal and Replacement Procedures
R e m o v in g
t h e 1 3 . 3 "
Disp lay
P a n e lA s s e m b ly ,
c o n t i n u e d
4. Open thedisplay panelassembly andremove thescrew from the
backlightcable.Disconnect thebacklight cablefrom the ZIFconnector onthe systemboard.
Next Step
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Maintenance & Service GuidePresario 1900 Series
Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,1922, 1925, 1926, 1927, 1928, 1929, and 1930
Before You Begin Specifications Parts Catalog
Removal Sequence Troubleshooting Battery Operations
Product Description Pin Assignments Index
Removal and Replacement Procedures
R e m o v in g t h e
1 3 .3 " D is p la y
Pa n e l A s s e m b ly ,
c o n t i n u e d
6. Close the display panelassembly.
7. Remove the hingescrews on each sideand a clamp (rightside) on top of thebase pan assembly.
Next Step
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Maintenance & Service GuidePresario 1900 Series
Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,1922, 1925, 1926, 1927, 1928, 1929, and 1930
Before You Begin Specifications Parts Catalog
Removal Sequence Troubleshooting Battery Operations
Product Description Pin Assignments Index
Removal and Replacement Procedures
R e m o v in g t h e
1 3 .3 " D is p la y
Pa n e l A s s e m b ly ,c o n t i n u e d
8. Remove three hingescrews (rear of unit)from each side of thebase pan assembly.
Next Step
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Maintenance & Service GuidePresario 1900 Series
Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,1922, 1925, 1926, 1927, 1928, 1929, and 1930
Before You Begin Specifications Parts Catalog
Removal Sequence Troubleshooting Battery Operations
Product Description Pin Assignments Index
Removal and Replacement Procedures
ElectrostaticDischarge
ServiceConsiderations
Cables andConnectors
Preparing theComputer forDisassembly
Battery Pack
Hard Drive
Keyboard
MemoryModule
Modem
Heatspreader
Processor
Display PanelAssembly
Upper CPUCover withPalmrest and
TouchPadHard Drive/BatteryCharger Board
ConverterBoard
Low VoltageDifferentialSignal Board
Fan Assembly
System Board
SpeakerAssembly
Disassemblingthe Wedge
DVD or CDDrive
System toWedgeInterfaceBoard
Diskette Drive
Wedge to PortReplicatorInterfaceBoard
How to useProcessor Jig
R e m o v in g t h e Ha rd
Driv e / B a t t e ry
Ch a r g e r B o a r d
To remove the harddrive/battery chargerboard, complete the
following steps:
1. Prepare the computer fordisassembly.
2. Remove the keyboard.
3. Remove the heatspreader.
4. Remove the displayassembly with flex cables
attached.
5. Remove the Upper CPUCover withPalmrest/TouchPad/Fan.
6. Remove four screws fromthe hard drive/batterycharger board located frontcenter portion of thechassis.
To replace the harddrive/battery charger boardreverse the previousprocedures.
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Maintenance & Service GuidePresario 1900 Series
Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,
1922, 1925, 1926, 1927, 1928, 1929, and 1930
Before You Begin Specifications Parts Catalog
Removal Sequence Troubleshooting Battery Operations
Product Description Pin Assignments Index
Removal and Replacement Procedures
ElectrostaticDischarge
ServiceConsiderations
Cables andConnectors
Preparing theComputer forDisassembly
Battery Pack
Hard Drive
Keyboard
MemoryModule
Modem
Heatspreader
Processor
Display PanelAssembly
Upper CPUCover withPalmrest andTouchPad
Hard Drive/BatteryCharger Board
Converter
Board
Low VoltageDifferentialSignal Board
Fan Assembly
System
Board
SpeakerAssembly
Disassemblingthe Wedge
DVD or CDDrive
System toWedge
InterfaceBoard
Diskette Drive
Wedge to PortReplicatorInterfaceBoard
How to use
Processor Jig
R e m o v in g t h e
C o n v e r t e r
Board
To remove the
converter board,complete the followingsteps:
1. Prepare thecomputer for
disassembly.
2. Remove thekeyboard.
3. Remove thedisplay panelassembly.
4. Remove theUpper CPU cover
with PalmrestCover and
TouchPad.
5. Remove thehard drive.
6. Remove themodem.
7. Pull and lift theconverter boardfrom the systemboard connectorand remove
from the chassis.
To replace theconverter board,reverse the previousprocedures.
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Maintenance & Service GuidePresario 1900 Series
Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,1922, 1925, 1926, 1927, 1928, 1929, and 1930
Before You Begin Specifications Parts Catalog
Removal Sequence Troubleshooting Battery Operations
Product Description Pin Assignments Index
Removal and Replacement Procedures
ElectrostaticDischarge
ServiceConsiderations
Cables and
Connectors
Preparing theComputer forDisassembly
Battery Pack
Hard Drive
Keyboard
MemoryModule
Modem
Heatspreader
Processor
Display PanelAssembly
Upper CPUCover withPalmrest andTouchPad
Hard Drive/BatteryCharger Board
Converter
BoardLow VoltageDifferentialSignal Board
Fan Assembly
System Board
SpeakerAssembly
Disassemblingthe Wedge
DVD or CDDrive
System toWedgeInterfaceBoard
Diskette Drive
Wedge to PortReplicatorInterfaceBoard
How to useProcessor Jig
R e m o v in g t h e
Lo w V o lt a g e
D i f f e r e n t i a l
S ig n a l ( LV DS )
I n t e r f a c e
B oard
To remove the LVDSInterface Board,complete the followingsteps:
1. Prepare thecomputer for
disassembly.
2. Remove thekeyboard.
3. Remove theheatspreader.
4. Remove the twoscrews from theLVDS InterfaceBoard and liftfrom the chassis.
To replace the LVDSInterface Board reversethe previousprocedures.
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Maintenance & Service GuidePresario 1900 Series
Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,1922, 1925, 1926, 1927, 1928, 1929, and 1930
Before You Begin Specifications Parts Catalog
Removal Sequence Troubleshooting Battery Operations
Product Description Pin Assignments Index
Removal and Replacement Procedures
ElectrostaticDischarge
ServiceConsiderations
Cables andConnectors
Preparing theComputer forDisassembly
Battery Pack
Hard Drive
Keyboard
MemoryModule
Modem
HeatspreaderProcessor
Display PanelAssembly
Upper CPUCover withPalmrest and
TouchPad
Hard Drive/BatteryCharger Board
ConverterBoard
Low VoltageDifferentialSignal Board
Fan Assembly
SystemBoard
SpeakerAssembly
Disassemblingthe Wedge
DVD or CDDrive
System toWedge
InterfaceBoard
Diskette Drive
Wedge to PortReplicatorInterfaceBoard
How to useProcessor Jig
R e m o v in g t h e
S y s t e m B o a rd
To remove the system board,complete the following steps:
1. Prepare the computer for
disassembly.
2. Remove the keyboard.
3. Remove the display panel
assembly.
4. Remove the heatspreader.
5. Remove the processor.
Next Step
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Maintenance & Service GuidePresario 1900 Series
Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,1922, 1925, 1926, 1927, 1928, 1929, and 1930
Before You Begin Specifications Parts Catalog
Removal Sequence Troubleshooting Battery Operations
Product Description Pin Assignments Index
13. Remove the left hingebracket beforeremoving the converterboard.
14. Remove 1 screw at theright lower corner of
the converter board.
15. Lift the RJ11 connectoroff the guide postslocated on the rightside on the chassis.
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Maintenance & Service GuidePresario 1900 Series
Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,1922, 1925, 1926, 1927, 1928, 1929, and 1930
Before You Begin Specifications Parts Catalog
Removal Sequence Troubleshooting Battery Operations
Product Description Pin Assignments Index
Removal and Replacement Procedures
Electrostatic
Discharge
Service
Considerations
Cables and
Connectors
Preparing the
Computer for
Disassembly
Battery Pack
Hard Drive
Keyboard
MemoryModule
Modem
Heatspreader
Processor
Display Panel
Assembly
Upper CPU
Cover w ith
Palmrest and
TouchPad
Hard Drive/
Battery
Charger Board
Converter
Board
Low Voltage
Differential
Signal Board
Fan Assembly
System Board
SpeakerAssembly
Disassemblingthe Wedge
DVD or CD
Drive
System to
Wedge
Interface
Board
Diskette DriveWedge to Port
Replicator
Interface
Board
How to useProcessor Jig
R e m o v in g t h e
S p e a k e r
A s s e m b ly
To remove thespeaker assembly,
complete thefollowing steps:
1. Prepare thecomputer for
disassembly.
2. Remove thekeyboard.
3. Remove thedisplay panel
assembly.
4. Remove theUpper CPU cover
with Palmrest
Cover and
TouchPad.
5. Remove two
screws from thespeakerassembly,disconnect thespeaker cablesfrom the systemboard, and liftout of the unit.
To replace the speakerassembly, reverse theprevious procedures.
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Maintenance & Service GuidePresario 1900 Series
Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,1922, 1925, 1926, 1927, 1928, 1929, and 1930
Before You Begin Specifications Parts Catalog
Removal Sequence Troubleshooting Battery Operations
Product Description Pin Assignments Index
Removal and Replacement Procedures
D is a s s e m b lin g t h e
R e m o v a b le D riv e
W e d g e , co n t in u e d
4. Remove three screwsfrom the baseenclosure of the wedgeand lift off the wedgecover.
Next Step
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Maintenance & Service GuidePresario 1900 Series
Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,1922, 1925, 1926, 1927, 1928, 1929, and 1930
Before You Begin Specifications Parts Catalog
Removal Sequence Troubleshooting Battery Operations
Product Description Pin Assignments Index
Removal and Replacement Procedures
D is a s s e m b lin g t h e
R e m o v a b le D riv e
W e d g e , co n t in u e d
5. Remove two alignmentpins from the rear ofthe base enclosure ofthe wedge.
Next Step
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Maintenance & Service GuidePresario 1900 Series
Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,1922, 1925, 1926, 1927, 1928, 1929, and 1930
Before You Begin Specifications Parts Catalog
Removal Sequence Troubleshooting Battery OperationsProduct Description Pin Assignments Index
Removal and Replacement Procedures
D is a s s e m b lin g t h e
R e m o v a b le D riv e
W e d g e , co n t in u e d
6. Remove thereinforcement bracketfrom the front of thewedge.
Next Step
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Maintenance & Service GuidePresario 1900 Series
Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,1922, 1925, 1926, 1927, 1928, 1929, and 1930
Before You Begin Specifications Parts Catalog
Removal Sequence Troubleshooting Battery Operations
Product Description Pin Assignments Index
Removal and Replacement Procedures
ElectrostaticDischarge
ServiceConsiderations
Cables andConnectors
Preparing theComputer forDisassembly
Battery Pack
Hard Drive
Keyboard
MemoryModule
Modem
Heatspreader
Processor
Display PanelAssembly
Upper CPUCover withPalmrest andTouchPad
Hard Drive/BatteryCharger Board
Converter
BoardLow VoltageDifferentialSignal Board
Fan Assembly
System Board
SpeakerAssembly
Disassemblingthe Wedge
DVD or CD-ROM Drive
System toWedgeInterfaceBoard
Diskette Drive
Wedge to PortReplicatorInterfaceBoard
How to useProcessor Jig
R e m o v in g t h e
DV D o r CD-
R OM Driv e
To remove the CD-ROMor the DVD Drive with
shield attached,complete the followingsteps:
1. Prepare thecomputer for
disassembly.
2. Disassemble thewedge.
3. Remove twoscrews at therear of the CD-ROM or DVDDrive and lift theCD-ROM or DVDDrive with shieldattached off theconnectorwedge.
To replace the CD-ROMor DVD Drive withshield attached,reverse the previousprocedures.
Next Step
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Maintenance & Service GuidePresario 1900 Series
Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,1922, 1925, 1926, 1927, 1928, 1929, and 1930
Before You Begin Specifications Parts Catalog
Removal Sequence Troubleshooting Battery Operations
Product Description Pin Assignments Index
Removal and Replacement Procedures
R e m o v in g t h e
DVD o r CD-R OM
D riv e , c o n t in u e d
To remove the CD-ROM or
DVD Drive shield performthe following step:
4. Remove the screw whichsecure the CD-ROM or DVD
Drive shield.
To replace the CD-ROM or
DVD Drive shield, reverse theprevious procedure.
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Maintenance & Service GuidePresario 1900 Series
Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,1922, 1925, 1926, 1927, 1928, 1929, and 1930
Before You Begin Specifications Parts Catalog
Removal Sequence Troubleshooting Battery Operations
Product Description Pin Assignments Index
To remove the Diskette Driveor the LS-120 Drive shield,
perform the following step:
Remove the screw fromeach side of the
Diskette Drive or the LS-120 Drive shield and liftoff.
To replace the DisketteDrive or the LS-120Drive shield , reversethe previous procedure.
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Maintenance & Service GuidePresario 1900 Series
Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,1922, 1925, 1926, 1927, 1928, 1929, and 1930
Before You Begin Specifications Parts Catalog
Removal Sequence Troubleshooting Battery Operations
Product Description Pin Assignments Index
Removal and Replacement Procedures
Electrostatic
Discharge
ServiceConsiderations
Cables andConnectors
Preparing theComputer forDisassembly
Battery Pack
Hard Drive
Keyboard
MemoryModule
Modem
Heatspreader
Processor
Display PanelAssembly
Upper CPUCover withPalmrest andTouchPad
Hard Drive/BatteryCharger Board
ConverterBoard
Low VoltageDifferentialSignal Board
Fan Assembly
System Board
Speaker
AssemblyDisassemblingthe Wedge
DVD or CDDrive
System toWedgeInterface
Board
Diskette Drive
Wedge toPortReplicatorInterfaceBoard
How to use
Processor Jig
R e m o v in g t h e
W e d g e t o t h e
P o r t
R e p l i c a t o r
I n t e r f a c eBoard
To remove the Wedgeto the Port ReplicatorInterface board,complete the followingsteps:
1. Prepare thecomputer for
disassembly.
2. Disassemble thewedge.
3. Remove theCD ROMDrive or theDVD Drive
with shieldattachedfrom the unit.
4. Remove theDisketteDrive or theLS-120 Drivewith shield
attachedfrom the unit.
5. Remove twostandoffs fromthe Wedge tothe PortReplicatorInterface boardand lift theboard from the
unit.
To replace the Wedgeto Port ReplicatorInterface board,reverse the previousprocedures.
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Maintenance & Service GuidePresario 1900 Series
Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,1922, 1925, 1926, 1927, 1928, 1929, and 1930
Before You Begin Specifications Parts Catalog
Removal Sequence Troubleshooting Battery Operations
Product Description Pin Assignments Index
Removal and Replacement Procedures
ElectrostaticDischarge
ServiceConsiderations
Cables andConnectors
Preparing theComputer forDisassembly
Battery Pack
Hard Drive
Keyboard
MemoryModule
Modem
Heatspreader
Processor
Display PanelAssembly
Upper CPUCover withPalmrest andTouchPad
Hard Drive/BatteryCharger Board
ConverterBoard
Low VoltageDifferentialSignal Board
Fan Assembly
System Board
SpeakerAssembly
Disassemblingthe Wedge
DVD or CDDrive
System toWedgeInterface
Board
Diskette Drive
Wedge to PortReplicatorInterfaceBoard
How to useProcessor Jig
Unlock Processor Step 1
Unlock Processor Step 2
Un lo c k in g t h e
P r o c e s s o r
Refer to the illustrations at leftto verify. Follow these steps tolock processor:
1. Place the Jig Block on theCPU frame in the lower left-hand corner. Make sure thatthe block is fully seated. Thehandle must be at a 45
degree angle (as illustrated)when installing the Jig block.
2. Twist handle 90degrees counterclockwise to unlockprocessor.
To lock processor
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Maintenance & Service GuidePresario 1900 Series
Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,1922, 1925, 1926, 1927, 1928, 1929, and 1930
Before You Begin Specifications Parts Catalog
Removal Sequence Troubleshooting Battery Operations
Product Description Pin Assignments Index
Troubleshooting
PreliminarySteps
Clearing thePower-OnPassword
Power-On SelfTest (POST)
CompaqDiagnostics
DiagnosticError Codes
TroubleshootingWithoutDiagnostics
Solving MinorProblems
ContactingCompaqSupport
This section covers troubleshootinginformation for the Compaq Presario 1900Series Portable Computers. The basic steps introubleshooting include:
1. Follow thePreliminary Steps.
2. Run the Power-OnSelf-Test (POST).
3. Follow therecommendedactions described inthe diagnostictables, if you areunable to run POSTor if POST displaysan error message.
When following therecommended actions inthe Sections on POSTand Diagnostic ErrorCodesperform them inthe order listed. RerunPOST after each
recommended actionuntil the problem issolved and no errormessage occurs. Oncethe problem is solved, donot complete theremaining recommendedactions.
NOTE:
If the problem isintermittent,check thecomputer severaltimes to verifythat the problemis solved.
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Maintenance & Service GuidePresario 1900 Series
Models: 1900T, 1905, 1906, 1910, 1915, 1919, 1920,1922, 1925, 1926, 1927, 1928, 1929, and 1930
Before You Begin Specifications Parts Catalog
Removal Sequence Troubleshooting Battery Operations
Product Description Pin Assignments Index
Troubleshooting
Pre lim in a ry S t e p s
Before running POST, complete the following preliminary steps:
1. If a power-on password has been established, type the password and press theEnter key. If the password is not known, clear the password.
2. Run Compaq diagnostics.
3. Turn off the computer and its external devices.
4. Disconnect any external devices that you do not want to test. Do not disconnect theprinter if you want to test it or use it to log error messages.
IMPORTANT:
If the problem only occurs when an external device isconnected to the computer, the problem may be related tothe external device or it