pc support & repair
DESCRIPTION
PC Support & Repair. Chapter 13 Advanced Laptops & Portable Devices. Objectives. After completing this chapter, you will meet these objectives: Describe Bluetooth technology. Describe infrared technology. Describe cellular WAN technology. Describe Wi-Fi technology. - PowerPoint PPT PresentationTRANSCRIPT
Objectives•After completing this chapter, you will meet these
objectives:▫Describe Bluetooth technology. ▫Describe infrared technology. ▫Describe cellular WAN technology. ▫Describe Wi-Fi technology. ▫Describe satellite technology.
Bluetooth•Wireless, short distance
communication between devices▫Device can connect up to 7 others▫WPAN▫About 33 feet▫IEEE 802.15.1▫2.4GHz▫Low power, cost, size▫Security through PIN
Infrared• Low power, short range▫Line of sight▫Can’t go through walls▫3’ or less with computers▫Printer, keyboard, mouse
Wi-Fi• 802.11a, b, g, n▫B, g, n use 2.4GHz▫A uses 5GHz
• Enable security or use VPN
•WPA/WPA2 (Wi-Fi Protected Access)▫128-bit encryption▫Authentication
Satellite•For rural or remote user•Faster then dial-up, slower than DSL•High cost•Satellite dish, modem, coax cable•Bad weather can interfere
Review•Which wireless specifies WPAN?▫802.15.1
•Which wireless transmits with line-of-sight?▫Infrared
•Why is 802.11a not compatible with g?▫A is on 5GHz
•What kind of encryption is best for Wi-Fi & how many bit?▫WPA/WPA2 128-bit
Repair or Replace?•CRU▫Customer Replaceable Unit▫Battery, RAM
•FRU▫Field Replaceable Unit▫Not for customer to do▫Motherboard, LCD, keyboard
•B4 u fix, back up data & remove power, check warranty
Selecting Components•Select batteries. •Select a docking station or port replicator. •Select storage devices. •Select additional RAM.
Selecting Laptop Components•Retail Pack or OEM▫Retail
Documentation, warranty, drivers included
▫OEM Little or no packaging,
shorter warranty, good for system builders, can make more money
Selecting Batteries•What are signs of a bad battery?
•Test or try with a known good one•Replace with same type▫Ni-Cad, NiMH, Li-Ion
•Handle with care▫Can explode▫Dispose/recycle
Selecting Storage Devices• CRU• Internal▫Behind a cover on bottom▫Magnetic 2.5” with
platters▫ SSD with no moving parts
Uses less power• External▫USB or FireWire 1394▫Optical
Selecting RAM•Some of RAM used for graphics•SODIMM
•Check how many slots, type
•Remove battery & unplug!
•Check POST, BIOS, or System Properties after adding to verify
Review•What is the IEEE standard?▫1394
•What type of battery need to be drained & then recharged?▫Ni-Cad
• Before repairing a laptop, what three things should you do?▫Backup the data, remove all power sources, check warranty
•What danger do laptop batteries represent?▫They can explode
Preventive Maintenance for Laptops•Describe how to schedule and perform maintenance
for laptops. •Explain how to manage data version control between
desktops and laptops.
Maintenance•Preventive maintenance▫Cleaning
Air, mild cleaning, cotton swabs
▫Hard drive (cleanup & defrag)
▫Software
•Unplug & remove battery before cleaning