PC Support & RepairChapter 13Advanced 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. ▫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

Cellular WAN•Data access through

cellular network•Needs adapter

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

Activity

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

Repairs•Describe repairs for laptops and portable devices

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

Lab•13.2 Investigate Repair Centers

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

Review

Review- 12 Questions

PC Support & RepairChapter 13Advanced Laptops & Portable Devices