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Chapter 13

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Chapter 13:
Advanced Laptops
and Portable
Devices

IT Essentials: PC Hardware and Software v4.0

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Purpose of this Presentation


List of chapter objectives


Overview of the chapter contents, including

student worksheets

student activities

some potential student misconceptions


Reflection/Activities for instructors to complete to
prepare to teach


Additional resources

To provide to instructors an overview of Chapter 13:

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Chapter 13 Objectives


13.1 Describe wireless communication methods for
laptops and portable devices


13.2 Describe repairs for laptops and portable devices


13.3 Select laptop components


13.4 Describe preventive maintenance procedures for
laptops


13.5 Describe how to troubleshoot a laptop

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Chapter 13 Worksheets and Activity


13.1.5 Activity: Wireless Technologies


13.2 Worksheet: Investigating Repair Centers


13.3.1 Worksheet: Laptop Batteries


13.3.2 Worksheet: Docking Station


13.3.3 Worksheet: DVD Drive Research


13.3.4 Worksheet: Laptop RAM


13.5.3 Worksheet: Verify Work Order Information

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Introduction





With the increase in demand for mobility, the popularity
of laptops and portable devices will continue to grow.


A technician should be able to configure, optimize, and
troubleshoot laptops, portable

devices, docking stations and

accessories.


Some laptop manufacturers

require technicians complete

specialized certification

training to perform laptop

repairs.

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Wireless Communication Methods

13.1 Describe wireless communication methods for
laptops and portable devices


Bluetooth


Infrared


Cellular WANs


Wi
-
Fi


Satellite

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Bluetooth Technology


A short
-
range wireless technology designed to
eliminate the need for cables between portable or fixed
-
configuration devices.


Operates at 2.4 to 2.485 GHz in the unlicensed
Industrial, Scientific, and Medical (ISM) band.


Low power, low cost, and
small size.


Uses adaptive frequency
hopping.

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Infrared (IR) Technology


A short
-
range, low
-
throughput wireless technology used
as a data transmission medium.


Infrared light signals operate in the lowest light
frequency, typically between 100GHz to 1000THz.


Distances are limited to a few
feet or meters.


IR cannot penetrate any object
that blocks the light signal.

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Cellular WAN Technology


Cellular WAN connections are powerful, 2
-
way wireless
networks that have been around since the late 1970s.


Cellular networks operate in one of two ranges:

Approximately 800 MHz

Approximately 1900 MHz


Three generations of cellular WAN include voice
-
only
analog, digital, and high
-
speed data and voice.

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Wireless Fidelity (Wi
-
Fi) Technology


Wi
-
Fi is a wireless technology that provides a simple
connection from anywhere within the range of a base
station.


Connection distances of 300 feet (91 meters) or
more, depending on the
environment.


Ease of access makes Wi
-
Fi
a simple solution for network
connectivity.

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Satellite Technology


Satellite networks are faster than dial
-
up connections
but slower than Cable and DSL connections.


Satellite service is ideal for the rural or remote Internet
users.


Downloading files is faster than
uploading files.


Adverse weather conditions can
interfere with satellite reception.

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Wireless Technologies

Purpose

Devices

Range

Frequency

Limitation

Bluetooth

Radio
-
frequency
creating a WPAN
connecting portable
devices

Laptop, printer,
camera, PDA, cell
phone, smartphone,
hands
-
free headset

Low
-
power,
short range; 1
to 100 meters
(3 to 330 feet)

2.4 to 2.485
GHz

Device must be
Bluetooth
compatible.

Infrared
(IR)

Light waves used as
a data transmission
medium

projector, PDA,
printer, remote
control, wireless
mouse, wireless
keyboard

low
-
power,
short range (1
meter); low
through
-
put

100 GHz to
1000 THz

Susceptible to
interference
and dilution

Cellular
WAN

Cellular signal
creating a WWAN

Laptop, cell phone,
PDA, smartphone

Within several
miles of
cellular tower

850 to 1900
MHz

Only where cell
signal reaches

Wireless
Fidelity
(Wi
-
Fi)

Radio
-
frequency
creating high
-
speed
WLAN

Laptop, printer, and
other network
devices

33 to 100
meters (100 to
300 feet)

2.4 GHz or 5.0
GHz

The 2.4 GHz
range is
unregulated
and heavily
used.

Satellite

High
-
speed Internet
access; ideal when
no other broadband
access available

Laptop, GPS
devices,
smartphone

To the satellite

Up to 5,000
channels per
satellite

Slower than
DSL/Cable;
higher setup
costs

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Repairing Laptops and Portable Devices

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Selecting Replacement Components

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Selecting Batteries


The signs may not always
be apparent, but some are
obvious:

Laptop shuts off immediately
when AC power is removed

Battery is leaking

Battery overheats

Battery does not hold a
charge

How do you know when you need a new laptop battery?

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Select a Docking Station/Port Replicator


Increase the number of ports available to a laptop.


Convenient to connect the laptop to office network and
peripherals.

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Select Storage Devices


External USB hard drive


Firewire hard drive


DVD/CD burner


Storage devices are CRUs, unless a warranty requires
technical assistance.

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Select Additional RAM

Additional RAM speeds up the process by decreasing
the number of times the OS reads and writes data to the
hard drive swap file.

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Laptop Preventive Maintenance

Preventive maintenance should be scheduled at regular
intervals to keep laptops running properly. Because
laptops are portable, they are more likely to be exposed
to harmful materials and situations than desktop
computers.


Clean the laptop


Perform hard drive

maintenance

Disk Cleanup

Disk Defragmenter


Update software

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Disk Cleanup and Disk Defragmenter


Windows XP has two programs that help clean up the
hard drive:

Disk Cleanup

Disk Defragmenter

The computer can slow down if the operating system is
searching through fragmented files.

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File Management and Version Control

When moving files from a laptop to a desktop computer,
be careful that data copied from one computer does not
inadvertently overwrite data on the other computer.

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Step 1

Gather data from the customer

Step 2

Verify the obvious issues

Step 3

Try quick solutions first

Step 4

Gather data from the computer

Step 5

Evaluate the problem and implement the solution

Step 6

Close with the customer

Troubleshooting Process

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1. Gather Data from the Customer


Customer information

Company name, contact name, address, phone number


Laptop information

Manufacturer, model, OS, network environment, connection
type


Description of problem

In the scenario outlined in the student course content,
the
laptop will not boot.

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2. Verify the Obvious Issues

Examine the most obvious causes of a problem.


Is the laptop plugged in with the AC adapter?


Is the battery secure?


Is the power switch turned on?


Have there been any power outages?


Have any cables been unplugged?


Are the cables or connectors damaged?

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3. Try Quick Solutions First

A quick solution can save time and money.


Replace the AC power adapter with a known good AC
power adapter.


Remove and reinsert the battery, making sure that it is
secure and locked in place.


Replace battery with a known good battery.

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4. Gather Data from the Computer

After connecting the AC adapter to a power outlet and
the laptop still does not boot,


Remove the battery and start the laptop with just the
AC adapter connected to a power outlet.


Check the connections inside the laptop case:

Reseat the memory module.

Remove the hard drive and then reinstall it.

Remove any optical drives, such as the CD or DVD drive.

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5. Evaluate Problem & Implement Solution

1.
Evaluate the information gathered from the customer
and from the laptop

2.
Determine possible solutions

3.
Implement the best solution

Note:

Try each solution one at a time. If a solution is tried
and the problem is not fixed, then the technician
should totally reverse the attempted solution before
proceeding to the next step.

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6. Close with the Customer


Discuss with customer the solution implemented.


Have customer verify problem is solved.


Provide all paperwork to customer.


Document steps of solution.


Document components used in repair.


Document time spent to resolve the problem.

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Common Problems and Solutions

Problem Symptom

Possible Solution

A laptop user complains that
numerous peripheral cables are
constantly getting tangled.

Provide information to the user about
cordless peripherals.

A laptop user is unable to connect to
the wireless network.

Reconfigure the wireless security on
the laptop to connect to the security
system used by the network.

The laptop keyboard no longer
works.

The keyboard is a FRU. Advise the
customer to take the laptop to a
repair center or return it to the
manufacturer.

A user reports that the laptop battery
needs recharging more frequently
than when it was new.

Have the user completely discharge
the battery, then fully recharge it.

A user obtains a new laptop and
reports that it does not fit in the
existing docking station.

Docking stations are proprietary.
Verify that the user has a compatible
model.

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Apply Troubleshooting Skills


Now that you understand the troubleshooting process, it
is time to apply your listening and diagnostic skills.


The worksheet is designed to reinforce your
communication skills to

verify information from

the customer.

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Chapter 13 Summary

Advanced Laptops and Portable Devices


Describe wireless communication methods


Describe CRU and FRU repairs


Select laptop CRU components


Schedule and perform preventive maintenance


Troubleshoot laptop issue as a level
-
two technician

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Additional Resources


Bluetooth Basics
http://www.bluetooth.com/Bluetooth/Learn/Basics/


Wireless Networking Overview
http://www.escotal.com/wifi.html


Wireless Network Technology
http://www.northoak
-
training.com/Wireless.htm



“Infrared” from About.com
http://compnetworking.about.com/od/homenetworking/g/bldef_infrared.htm


Wide
-
Area Wireless Computing from Network Computing
http://www.networkcomputing.com/netdesign/wireless1.html


802.11 Wireless Standards from About.com
http://compnetworking.about.com/od/wireless80211/80211_Wireless_Standards.ht
m



Wi
-
Fi Alliance
http://www.wi
-
fi.org



Satellite Internet Service Information
http://www.high
-
speed
-
internet
-
access
-
guide.com/satellite/



Howstuffworks: “How does satellite Internet operate?”
http://computer.howstuffworks.com/question606.htm


Cleaning laptop keyboards from Computing.Net
http://www.computing.net/howto/simple/keyboard/


Cleaning a Laptop Computer from About.com
http://mobileoffice.about.com/od/usingyourlaptop/a/cleanlaptop.htm



Book: Wireless Home Networking Simplified (Cisco Press book) ISBN
#1587201615

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Q and A

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