This guide is a troubleshooting reference used for maintaining
and servicing the computer. It provides comprehensive
information on identifying computer features, components, and
spare parts; troubleshooting computer problems; and performing
computer disassembly procedures.
Microsoft and Windows are U.S. registered trademarks of
Microsoft Corporation. Intel and Core are trademarks or registered
trademarks of Intel Corporation or its subsidiaries in the United States and
other countries. AMD, Sempron, Turion, and combinations thereof, are
trademarks of Advanced Micro Devices, Inc. Bluetooth is a trademark
owned by its proprietor and used by Hewlett-Packard Company under
license.
The information contained herein is subject to change without notice.
The only warranties for HP products and services are set forth in the
express warranty statements accompanying such products and services.
Nothing herein should be construed as constituting an additional warranty.
HP shall not be liable for technical or editorial errors or omissions
contained herein.
Maintenance and Service Guide
HP Pavilion dv2000 Notebook PC
First Edition: June 2006
Document Part Number: 417981-001
The HP Pavilion dv2000 Notebook PC offers advanced
modularity, Intel® Core™ Duo and Core Solo processors or
AMD Turion™ 64 Mobile Technology and Mobile AMD
Sempron™ processors, and extensive multimedia support.
1
HP Pavilion dv2000 Notebook PC
Maintenance and Service Guide1–1
Product Description
1.1Features
■ The following processors are available, varying by
computer model:
❏ Intel Core Duo T2600 (2.16-GHz)
❏ Intel Core Duo T2500 (2.00-GHz)
❏ Intel Core Duo T2400 (1.83-GHz)
❏ Intel Core Duo T2250 (1.73-GHz)
❏ Intel Core Duo T2300 (1.66-GHz)
❏ Intel Core Duo T2050 (1.60-GHz)
❏ Intel Core Solo T1350 (1.80-GHz)
❏ AMD Turion ML-52 1.60-Ghz
❏ AMD Turion ML-50 1.60-GHz
❏ Mobile AMD Sempron 3400+ (1.80-GHz)
❏ Mobile AMD Sempron 3200+ (1.60-GHz)
■ 14.0-inch WXGA (1280 × 768) TFT display with over
16.7 million colors, varying by computer model
■ 120-, 100-, 80-, 60-, or 40-GB high-capacity hard drive,
varying by computer model
■ 256-MB DDR synchronous DRAM (SDRAM) at 667 MHz
and 533 MHz, expandable to 2.0 GB
■ Microsoft® Windows® XP Home Edition or Windows XP
Professional, or Free DOS, varying by computer model
■ Full-size Windows keyboard with embedded numeric keypad
■ TouchPad pointing device with on/off button and dedicated
two-way scroll zone
■ Integrated 10/100 BASE-T Ethernet local area network
(LAN) network interface card (NIC) with RJ-45 jack
■ Integrated high-speed 56K modem with RJ-11 jack
1–2Maintenance and Service Guide
Product Description
■ Integrated wireless support for Mini Card IEEE 802.11b and
802.11b/g WLAN device
■ Support for one ExpressCard
■ External 65-watt AC adapter with 3-wire power cord
■ 6-cell or 12-cell Li-Ion battery
■ Stereo speakers with volume up and down buttons
■ Integrated Web camera (select models only)
■ Integrated microphone (select models only)
■ Support for the following optical drives:
❏ DVD/CD-RW Combo Drive
❏ DVD±RW/R and CD-RW Double-Layer Combo Drive
❏ DVD±RW/R and CD-RW Double-Layer Combo Drive
with LightScribe
■ Connectors:
❏ Audio-in (microphone)
❏ Audio-out (headphone)
❏ Consumer infrared lens
❏ Docking (select models only)
❏ ExpressCard
❏ External monitor
❏ IEEE 1394 digital (select models only)
❏ Memory Reader Slot (select models only)
❏ Power
❏ RJ-11 (modem)
❏ RJ-45 (network)
❏ S-Video-out (select models only)
❏ Universal Serial Bus (USB) v. 2.0
Maintenance and Service Guide1–3
Product Description
1.2 Resetting the Computer
If the computer you are servicing has an unknown password,
follow these steps to clear the password. These steps also
clear CMOS:
1. Prepare the computer for disassembly (refer to Section 5.3,
“Preparing the Computer for Disassembly,” for more
information).
2. Remove the real-time clock (RTC) battery (refer to
Section 5.5, “RTC Battery,” for more information).
3. Wait approximately 5 minutes.
4. Replace the RTC battery and reassemble the computer.
5. Connect AC power to the computer. Do not reinsert any
batteries at this time.
6. Turn on the computer.
All passwords and all CMOS settings have been cleared.
1–4Maintenance and Service Guide
1.3Power Management
The computer comes with power management features that
extend battery operating time and conserve power. The
computer supports the following power management features:
■ Standby
■ Hibernation
■ Setting customization by the user
■ Hotkeys for setting the level of performance
■ Battery calibration
■ Lid switch standby/resume
■ Power button
■ Advanced Configuration and Power Management (ACPM)
compliance
Product Description
Maintenance and Service Guide1–5
Product Description
1.4 External Components
The external components on the front of the computer are shown
below and described in Table 1-1.
Front Components
Tabl e 1-1
Front Components
ItemComponentFunction
1Power light■ On: The computer is on.
■ Blinking: The computer is in standby.
■ Off: The computer is off.
2Battery light■ On: A battery is charging.
■ Blinking: A battery that is the only
available power source has reached a
low battery condition or a critical
low-battery condition.
■ Off: If the computer is plugged into an
external power source, the light is turned
off when all batteries in the computer are
fully charged. If the computer is not
plugged into an external power source,
the light stays off until the battery
reaches a low-battery condition.
3Drive lightBlinking: The hard drive or optical drive is
being accessed.
1–6Maintenance and Service Guide
Tabl e 1-1
Front Components
ItemComponentFunction
Product Description
4Wireless switch
(select models only)
5Wireless lightBlue: An integrated wireless device, such
6Consumer infrared
lens
7Audio-in
(microphone) jack
8Audio-out
(headphone) jacks (2)
Turns the wireless feature on or off, but
does not create a wireless connection.
To establish a wireless connection, a
✎
wireless network must already be set
up.
as a wireless local area network (LAN)
device and/or a Bluetooth® device, is
turned on.
Red: An integrated wireless device is
turned off.
Links the computer to the HP Remote
Control.
Connects an optional computer headset
microphone, stereo array microphone, or
monaural microphone.
Produce sound when connected to optional
powered stereo speakers, headphones, ear
buds, a headset, or television audio.
Depending on your computer model,
✎
the computer may have 1 or 2
audio-out (headphone) jacks.
Maintenance and Service Guide1–7
Product Description
The external components on the right side of the computer are
shown below and described in Table 1-2.
Right-Side Components
1–8Maintenance and Service Guide
Product Description
Tabl e 1-2
Right-Side Components
ItemComponentFunction
1Optical driveReads an optical disc.
2USB ports (2)Connect optional USB devices.
3RJ-11 (modem) jackConnects a modem cable.
4Power connectorConnects an AC adapter.
Maintenance and Service Guide1–9
Product Description
The external components on the left side of the computer are
shown below and described in Table 1-3.
Left-Side Components
1–10Maintenance and Service Guide
Product Description
Tabl e 1-3
Left-Side Components
ItemComponentFunction
1Security cable slotAttaches an optional security cable to the
computer.
The security cable is designed to act
✎
as a deterrent, but it may not prevent
the computer from being mishandled
or stolen.
2S-Video-out jackConnects an optional S-Video device such
as a television, VCR, camcorder, overhead
projector, or video capture card.
3External monitor portConnects an external VGA monitor or
projector.
4Expansion port 3Connects the computer to an optional
expansion product.
The computer has only one
✎
expansion port. The term
describes the type of
port 3
expansion port.
expansion
5RJ-45 (network) jackConnects a network cable.
6USB portConnects an optional USB device.
71394 portConnects an optional IEEE 1394 or 1394a
device, such as a camcorder.
8Digital Media SlotSupports the following optional digital card
formats: Secure Digital (SD) Memory Card,
MultiMediaCard (MMC), Secure Digital
Input/Output (SD I/O), Memory Stick (MS),
Memory Stick Pro (MSP), xD-Picture Card
(XD), xDPicture Card (XD) Type M.
The keyboard components on the computer are shown below and
described in Table 1-4.
Keyboard Components
1–12Maintenance and Service Guide
Product Description
Table 1-4
Keyboard Components
ItemComponentFunction
1f1 to f12 keys (12)Execute frequently used system functions
when pressed in combination with the
fn key.
2caps lock keyEnables caps lock and turns on the caps
lock light.
3fn
4Windows logo keyDisplays the Microsoft Windows Start
5Windows
6Arrow keysMove the cursor around the screen.
7Embedded numeric
8num lock keyEnables numeric lock, turns on the
keyExecutes frequently used system
functions when pressed in combination
with a function key or the esc key.
menu.
Displays a shortcut menu for items
applications key
keypad keys (15)
beneath the pointer.
Can be used like the keys on an external
numeric keypad.
embedded numeric keypad, and turns
on the num lock light.
Maintenance and Service Guide1–13
Product Description
The top components on the computer are shown below and
described in Table 1-5.
Top Components, Part 1
1–14Maintenance and Service Guide
Tabl e 1-5
Top Components, Part 1
ItemComponentFunction
1Caps lock lightOn: Caps lock is on.
2Power buttonWhen the computer is
■ Off, press to turn on the computer.
■ On, press to enter hibernation.
■ In standby, briefly press to exit standby.
■ In hibernation, briefly press to exit
hibernation.
If the computer has stopped responding
and Microsoft® Windows® shutdown
procedures cannot be used, press and hold
the power button for at least 5 seconds to
turn off the computer.
3Speakers (2)Produce sound.
Product Description
4Internal microphones
(2, select models only)
5Integrated cameraRecords video and captures still
6Volume mute buttonMutes and restores speaker volume.
7Volume scroll zoneAdjusts volume. Slide your finger to the left
8Num lock lightOn: Num lock is on or the embedded
Maintenance and Service Guide1–15
Record sound.
If there is a microphone icon next to each
microphone opening, your computer has
internal microphones.
photographs.
to decrease volume and to the right to
increase volume. Alternatively, you can tap
the left half of the scroll zone to decrease
volume, or you can tap the right half of the
scroll zone to increase volume.
numeric keypad is enabled.
Product Description
The top components on the computer are shown below and
described in Table 1-6.
Top Components, Part 2
1–16Maintenance and Service Guide
Product Description
Tabl e 1-6
Top Components, Part 2
ItemComponentFunction
1Media buttonIf QuickPlay is not installed and the
computer is
■ On, the media button opens the music
program or Media menu, allowing you to
select a multimedia program.
■ Off, the media button does not function.
■ In standby, the media button resumes
from standby into Windows.
If QuickPlay is installed and the computer is
■ On, the media button opens the music
program or Media menu, allowing you to
select a multimedia program.
■ Off, the media button opens the music
program or the Media menu, allowing
you to select a multimedia program.
■ In standby, the media button resumes
from standby into Windows.
The media button does not affect the
✎
hibernation file or the procedure for
restoring from hibernation.
2DVD buttonWhen the computer is
■ On, the DVD button opens the default
DVD program to start a DVD in the
optical drive.
■ Off, the DVD button opens QuickPlay to
start a DVD in the optical drive. If the
QuickPlay software is not installed, the
computer starts in Windows.
■ In hibernation, opens QuickPlay to start a
DVD in the optical drive. If the QuickPlay
software is not installed, the computer
resumes from hibernation.
Maintenance and Service Guide1–17
Product Description
The top components on the computer are shown below and
described in Table 1-7.
Top Components, Part 3
Tabl e 1-7
Top Components, Part 3
ItemComponentFunction
1Previous/Rewind
Button
2Play/Pause buttonWhen a disc is in the optical drive and is
3Next/Fast Forward
button
4Stop buttonWhen a disc is playing in the optical drive,
1–18Maintenance and Service Guide
When a disc is playing in the optical drive:
■ Press to play the previous track or
chapter.
■ Press fn+ this button to rewind.
■ Not playing, press to play the disc.
■ Playing, press to pause the disc.
When a disc is playing in the optical drive:
■ Press once to play the next track or
chapter.
■ Press fn+ this button to fast forward.
press to stop the current disc activity.
Product Description
The TouchPad components are shown below and described in
Table 1-8.
TouchPad Components
Tabl e 1-8
TouchPad Components
ItemComponentFunction
1TouchPad on/off
button
2TouchPadMoves the pointer and selects or activates
3Left and right
TouchPad buttons
4TouchPad scroll zoneScrolls upward or downward.
Maintenance and Service Guide1–19
Enables/disables the TouchPad.
items on the screen.
Function like the left and right buttons on an
external mouse.
Product Description
The external components on the bottom of the computer are
shown below and described in Table 1-9.
Bottom Components
Table 1 -9
Bottom Components
ItemComponentFunction
1Battery bayHolds the battery
2Battery release latchReleases the battery from the battery
bay.
3Optical driveReads an optical disc.
4Hard drive bayHolds the hard drive.
1–20Maintenance and Service Guide
Table 1 -9
Product Description
Bottom Components
ItemComponentFunction
5Vents (4)Enable airflow to cool internal
6Memory module
compartment
7Mini Card compartmentHolds a wireless LAN device
(Continued)
components.
To prevent overheating, do not
Ä
obstruct vents. Use the computer
only on a hard, flat surface. Do
not allow another hard surface,
such as an adjoining optional
printer, or a soft surface, such as
pillows or thick rugs, or clothing,
to block airflow.
The computer fan starts up
✎
automatically to cool internal
components and prevent
overheating. It is normal for the
internal fan to cycle on and off
during routine operation.
Contains the memory module slots.
(select models only).
To prevent an unresponsive
✎
system and the display of a
warning message, replace only
with a Mini Card device
authorized for use in the
computer by the governmental
agency that regulates wireless
devices in your country. If you
replace the device and then
receive a warning message,
remove the device to restore
computer functionality. Then
contact Customer Care through
the Help and Support Center.
Maintenance and Service Guide1–21
Product Description
1.5Design Overview
This section presents a design overview of key parts and features
of the computer. Refer to Chapter 3, “Illustrated Parts Catalog,”
to identify replacement parts, and Chapter 5, “Removal and
Replacement Procedures,” for disassembly steps.
The system board provides the following device connections:
■ AMD Turion and Mobile AMD Sempron processors or
Intel Core Duo and Core Solo processors
■ Audio
■ Display
■ ExpressCard
■ Fan
■ Hard drive
■ Keyboard and TouchPad
■ Memory module
■ Mini Card modules
CAUTION: To properly ventilate the computer, allow at least a 7.6-cm
Ä
(3-inch) clearance on the left and right sides of the computer.
The computer uses an electric fan for ventilation. The fan is
controlled by a temperature sensor and is designed to turn on
automatically when high temperature conditions exist. These
conditions are affected by high external temperatures, system
power consumption, power management/battery conservation
configurations, battery fast charging, and software. Exhaust air is
displaced through the ventilation grill located on the left side of
the computer.
1–22Maintenance and Service Guide
WARNING: Only authorized technicians trained by HP should repair
Å
this equipment. All troubleshooting and repair procedures are detailed
to allow only subassembly-/module-level repair. Because of the
complexity of the individual boards and subassemblies, do not attempt
to make repairs at the component level or modifications to any printed
wiring board. Improper repairs can create a safety hazard. Any
indication of component replacement or printed wiring board
modification may void any warranty or exchange allowances.
2.1 Setup Utility
The Setup Utility is a ROM-based information and customization
utility that can be used even when your Windows operating
system is not working or will not load.
The utility reports information about the computer and provides
settings for startup, security, and other preferences.
1. Turn on or restart the computer in Windows.
2
Troubleshooting
2. Before Windows opens and while the “Press <F10> to enter
setup” prompt is displayed in the lower-left corner of the
screen, press
Maintenance and Service Guide2–1
f10.
Troubleshooting
2.2 Using the Setup Utility
Changing the Language of the Setup Utility
The following procedure explains how to change the language of
the Setup Utility. If the computer is not in the Setup Utility, begin
at step 1. If the computer is in the Setup Utility, begin at step 2.
1. To open the Setup Utility, turn on or restart the computer in
Windows, and then press
to enter setup,” is displayed in the lower-left corner of the
screen.
2. Use the arrow keys to select System Configuration > Language, and then press
f10 while the prompt, “Press <F10>
enter.
3. Press
f5 or f6 (or use the arrow keys) to select a language, and
then press enter to select a language.
4. When a confirmation prompt with your preference selected is
displayed, press
5. To set your preferences and exit the Setup Utility, press
enter to save your preference.
f10
and then follow the instructions on the screen.
Your preferences go into effect when the computer restarts in
Windows.
2–2Maintenance and Service Guide
Troubleshooting
Navigating and Selecting in the Setup Utility
Because the Setup Utility is not Windows-based, it does not
support the TouchPad. Navigation and selection are by keystroke.
■ To choose a menu or a menu item, use the arrow keys.
■ To choose an item in a drop-down list or to toggle a field, for
example an Enable/Disable field, use either the arrow keys
f5 or f6.
or
■ To select an item, press enter.
■ To close a text box or return to the menu display, press f1.
■ To display additional navigation and selection information
while the Setup Utility is open, press
f1.
Displaying System Information
The following procedure explains how to display system
information in the Setup Utility. If the Setup Utility is not open,
begin at step 1. If the Setup Utility is open, begin at step 2.
1. To open the Setup Utility, turn on or restart the computer in
Windows, and then press
to enter setup,” is displayed in the lower-left corner of the
screen.
f10 while the prompt, “Press <F10>
2. Access the system information by using the Main menu.
3. To close the Setup Utility without changing any settings, use
the arrow keys to select Exit > Exit Discarding Changes,
and then press
Maintenance and Service Guide2–3
enter. (The computer restarts in Windows.)
Troubleshooting
Restoring Default Settings in the
Setup Utility
The following procedure explains how to restore the Setup Utility
default settings. If the computer is not in the Setup Utility, begin
at step 1. If the computer is in the Setup Utility, begin at step 2.
1. To open the Setup Utility, turn on or restart the computer in
Windows, and then press
to enter setup,” is displayed in the lower-left corner of the
screen.
f10 while the prompt, “Press <F10>
2. Select Exit > Load Setup Defaults, and then press
3. When the Setup Confirmation is displayed, press
your preferences.
4. To set your preferences and exit the Setup Utility, press
and then follow the instructions on the screen.
The Setup Utility default settings are set when you exit the
Setup Utility and go into effect when the computer restarts.
Your password, security, and language settings are not
✎
changed when you restore the factory default settings.
enter to save
Using Advanced Setup Utility Features
This guide describes the Setup Utility features recommended for
all users. For more information about the Setup Utility features
recommended for advanced users only, refer to the Help and
Support Center, which is accessible only when the computer is in
Windows.
The Setup Utility features available for advanced users include a
hard drive self-test, a Network Service Boot, and settings for boot
order preferences.
The “<F12> to boot from LAN” message that is displayed in the
lower-left corner of the screen each time the computer is started
or restarted in Windows or restored from hibernation is the
prompt for a Network Service Boot.
f10.
f10,
2–4Maintenance and Service Guide
The “Press <ESC> to change boot order” message that is
displayed in the lower-left corner of the screen each time the
computer is started or restarted in Windows or restored from
hibernation is the prompt to change the boot order.
Closing the Setup Utility
You can close the Setup Utility with or without saving changes.
■ To close the Setup Utility and save your changes from the
current session, use either of the following procedures:
❏ Press f10, and then follow the instructions on the screen.
– or –
❏ If the Setup Utility menus are not visible, press esc to
return to the menu display. Then use the arrow keys to
select Exit > Exit Saving Changes, and then press
Troubleshooting
enter.
When you use the
f10 procedure, you are offered an option
to return to the Setup Utility. When you use the Exit
Saving Changes procedure, the Setup Utility closes when
you press
❏ To close the Setup Utility without saving your changes
enter.
from the current session:
If the Setup Utility menus are not visible, press
esc to
return to the menu display. Then use the arrow keys
to select Exit > Exit Discarding Changes, and then
enter.
press
After the Setup Utility closes, the computer restarts in Windows.
Maintenance and Service Guide2–5
Troubleshooting
2.3 Setup Utility Menus
The menu tables in this section provide an overview of Setup
Utility options.
Some of the Setup Utility menu listed in this chapter may not
✎
be supported by your computer.
Selecting from the Main Menu
Table 2 -1
Main Menu
SelectTo Do This
System Information
■ View and change the system time and date.
■ View identification information about the
computer.
■ View specification information about the
processor, memory size, system BIOS, and
keyboard controller version (select models
only).
Selecting from the Security Menu
Table 2 -2
Security Menu
SelectTo Do This
Administrator passwordEnter, change, or delete an administrator
password.
Power-on passwordEnter, change, or delete a power-on password.
2–6Maintenance and Service Guide
Selecting from the System
Configuration Menu
Table 2 -3
System Configuration Menu
SelectTo Do This
Language SupportChange the Setup Utility language.
Troubleshooting
Embedded WLAN Device
Radio
Embedded Bluetooth
Device (select models only)
Enhanced SATA support
Enable/disable an embedded wireless LAN
device.
Enable/disable an embedded Bluetooth® device
(select models only).
Enable/disable enhanced SATA mode.
(select models only)
Boot OptionsSet the following boot options:
■ f10 and f12 Delay (sec.)—Set the delay for the
f10 and f12 functions of the Setup Utility in
intervals of 5 seconds each (0. 5, 10, 15, 20).
■ CD-ROM boot—Enable/disable boot from
CD-ROM.
■ Floppy boot—Enable/disable boot from Floppy.
■ Internal Network Adapter boot—Enable/disable
boot from Internal Network Adapter.
■ Boot Order—Set the boot order for:
❐ USB Floppy
❐ ATAPI CD/DVD ROM Drive
❐ Hard drive
❐ USB Diskette on Key
❐ USB Hard drive
❐ Network adapter
Maintenance and Service Guide2–7
Troubleshooting
Selecting from the Diagnostics Menu
Table 2 -4
Diagnostics Menu
SelectTo Do This
Hard Disk Self TestRun a comprehensive self-test on the hard drive.
On models with two hard drives, this menu
✎
option is called the Primary Hard Disk Self
Test.
Secondary Hard Disk Self
Test (select models only)
Run a comprehensive self-test on a secondary
hard drive.
secured by C-clips)
Mini Card compartment cover (includes 1 captive screws, secured by
a C-clip)
(Continued)
Spare Part
Number
430466-001
417088-001
430467-001
417090-001
430464-001
9aModem modules (include modem module cable)
For use with computer models using Intel processors
For use with computer models using AMD
9b
10ExpressCard assembly417112-001
11Speaker assembly417089-001
Maintenance and Service Guide3–5
processors
Modem module cable
417083-001
431852-001
Illustrated Parts Catalog
Computer Major Components
3–6Maintenance and Service Guide
Table 3-1
Illustrated Parts Catalog
Spare Parts: Computer Major Components
ItemDescription
12System boards
For use with computer models using Intel processors:
■ PM/G72M-V for use with full-featured computer
models
■ GM for use with full-featured computer models
■ GMZ for use with defeatured computer models
For use with computer models using AMD processors:
■ For use with full-featured computer models
■ For use with defeatured computer models
13Wireless switch board (includes wireless switch
board cable)
14Audio/infrared board (includes audio/infrared
board cable)
15Processors (include thermal pad)
Intel Core Duo T2600 (2.16-GHz)
Intel Core Duo T2500 (2.00-GHz)
Intel Core Duo T2400 (1.83-GHz)
Intel Core Duo T2250 (1.73-GHz)
Intel Core Duo T2300 (1.66-GHz)
Intel Core Duo T2050 (1.60-GHz)
431851-001Fan/heat sink assembly for use only on computer models
using AMD processors (includes thermal pad)
431852-001Modem module for use only on computer models using
AMD processors
(Continued)
3–34Maintenance and Service Guide
Removal and Replacement
This chapter provides essential information for proper and
safe removal and replacement service.
4.1 Tools Required
You will need the following tools to complete the removal and
replacement procedures:
■ Magnetic screwdriver
■ Phillips P0 and P1 screwdrivers
■ Flat-bladed screwdriver
4
Preliminaries
Maintenance and Service Guide4–1
Removal and Replacement Preliminaries
4.2 Service Considerations
The following sections include some of the considerations
that you should keep in mind during disassembly and assembly
procedures.
As you remove each subassembly from the computer, place
✎
the subassembly (and all accompanying screws) away from
the work area to prevent damage.
Plastic Parts
Using excessive force during disassembly and reassembly can
damage plastic parts. Use care when handling the plastic parts.
Apply pressure only at the points designated in the maintenance
instructions.
Cables and Connectors
CAUTION: When servicing the computer, ensure that cables are
Ä
placed in their proper locations during the reassembly process.
Improper cable placement can damage the computer.
Cables must be handled with extreme care to avoid damage.
Apply only the tension required to unseat or seat the cables
during removal and insertion. Handle cables by the connector
whenever possible. In all cases, avoid bending, twisting, or
tearing cables. Ensure that cables are routed in such a way that
they cannot be caught or snagged by parts being removed or
replaced. Handle flex cables with extreme care; these cables
tear easily.
4–2Maintenance and Service Guide
Removal and Replacement Preliminaries
4.3 Preventing Damage to
Removable Drives
Removable drives are fragile components that must be handled
with care. To prevent damage to the computer, damage to a
removable drive, or loss of information, observe the following
precautions:
■ Before removing or inserting a hard drive, shut down the
computer. If you are unsure whether the computer is off or
in Hibernation, turn the computer on, and then shut it down
through the operating system.
■ Before removing a diskette drive or optical drive, ensure that
a diskette or disc is not in the drive and ensure that the optical
drive tray is closed.
■ Before handling a drive, ensure that you are discharged of
static electricity. While handling a drive, avoid touching the
connector.
■ Handle drives on surfaces covered with at least one inch of
shock-proof foam.
■ Avoid dropping drives from any height onto any surface.
■ After removing a hard drive, CD-ROM drive, or a diskette
drive, place it in a static-proof bag.
■ Avoid exposing a hard drive to products that have magnetic
fields, such as monitors or speakers.
■ Avoid exposing a drive to temperature extremes or liquids.
■ If a drive must be mailed, place the drive in a bubble pack
mailer or other suitable form of protective packaging and label
the package, “FRAGILE: Handle With Care.”
Maintenance and Service Guide4–3
Removal and Replacement Preliminaries
4.4 Preventing Electrostatic Damage
Many electronic components are sensitive to electrostatic
discharge (ESD). Circuitry design and structure determine the
degree of sensitivity. Networks built into many integrated circuits
provide some protection, but in many cases, the discharge
contains enough power to alter device parameters or melt
silicon junctions.
A sudden discharge of static electricity from a finger or other
conductor can destroy static-sensitive devices or microcircuitry.
Often the spark is neither felt nor heard, but damage occurs.
An electronic device exposed to electrostatic discharge might not
be affected at all and can work perfectly throughout a normal
cycle. Or the device might function normally for a while, then
degrade in the internal layers, reducing its life expectancy.
4–4Maintenance and Service Guide
Removal and Replacement Preliminaries
4.5 Packaging and Transporting
Precautions
Use the following grounding precautions when packaging and
transporting equipment:
■ To avoid hand contact, transport products in static-safe
containers, such as tubes, bags, or boxes.
■ Protect all electrostatic-sensitive parts and assemblies with
conductive or approved containers or packaging.
■ Keep electrostatic-sensitive parts in their containers until
the parts arrive at static-free workstations.
■ Place items on a grounded surface before removing items
from their containers.
■ Always be properly grounded when touching a sensitive
component or assembly.
■ Store reusable electrostatic-sensitive parts from assemblies
in protective packaging or nonconductive foam.
■ Use transporters and conveyors made of antistatic belts and
roller bushings. Ensure that mechanized equipment used for
moving materials is wired to ground and that proper materials
are selected to avoid static charging. When grounding is not
possible, use an ionizer to dissipate electric charges.
Maintenance and Service Guide4–5
Removal and Replacement Preliminaries
4.6 Workstation Precautions
Use the following grounding precautions at workstations:
■ Cover the workstation with approved static-shielding material
(refer to
■ Use a wrist strap connected to a properly grounded work
surface and use properly grounded tools and equipment.
■ Use conductive field service tools, such as cutters,
screwdrivers, and vacuums.
■ When using fixtures that must directly contact dissipative
surfaces, only use fixtures made of static-safe materials.
■ Keep the work area free of nonconductive materials, such
as ordinary plastic assembly aids and Styrofoam.
■ Handle electrostatic-sensitive components, parts, and
assemblies by the case or PCM laminate. Handle these
items only at static-free workstations.
■ Avoid contact with pins, leads, or circuitry.
■ Turn off power and input signals before inserting or removing
connectors or test equipment.
Table 4-2, “Static-Shielding Materials”).
4–6Maintenance and Service Guide
Removal and Replacement Preliminaries
4.7 Grounding Equipment and
Methods
Grounding equipment must include either a wrist strap or a
foot strap at a grounded workstation.
■ When seated, wear a wrist strap connected to a grounded
system. Wrist straps are flexible straps with a minimum of
one megohm ±10% resistance in the ground cords. To provide
proper ground, wear a strap snugly against the skin at all times.
On grounded mats with banana-plug connectors, use alligator
clips to connect a wrist strap.
■ When standing, use foot straps and a grounded floor mat.
Foot straps (heel, toe, or boot straps) can be used at standing
workstations and are compatible with most types of shoes
or boots. On conductive floors or dissipative floor mats, use
foot straps on both feet with a minimum of one megohm
resistance between the operator and ground. To be effective,
the conductive strips must be worn in contact with the skin.
Other grounding equipment recommended for use in preventing
electrostatic damage includes
■ Antistatic tape.
■ Antistatic smocks, aprons, and sleeve protectors.
■ Conductive bins and other assembly or soldering aids.
■ Nonconductive foam.
■ Conductive tabletop workstations with ground cords of
one megohm resistance.
■ Static-dissipative tables or floor mats with hard ties to
the ground.
■ Field service kits.
■ Static awareness labels.
■ Material-handling packages.
■ Nonconductive plastic bags, tubes, or boxes.
■ Metal tote boxes.
■ Electrostatic voltage levels and protective materials.
Maintenance and Service Guide4–7
Removal and Replacement Preliminaries
Table 4-1 shows how humidity affects the electrostatic voltage
levels generated by different activities.
Tabl e 4-1
Typical Electrostatic Voltage Levels
Relative Humidity
Event10%40%55%
Walking across carpet35,000 V15,000 V7,500 V
Walking across vinyl floor12,000 V 5,000 V3,000 V
Motions of bench worker6,000 V800 V400 V
Removing DIPS from plastic tube2,000 V700 V400 V
Removing DIPS from vinyl tray11,500 V4,000 V2,000 V
Removing DIPS from Styrofoam14,500 V5,000 V3,500 V
Removing bubble pack from PCB26,500 V20,000 V7,000 V
Packing PCBs in foam-lined box21,000 V11,000 V5,000 V
A product can be degraded by as little as 700 V.
✎
Table 4-2 lists the shielding protection provided by antistatic
bags and floor mats.
Table 4 -2
Static-Shielding Materials
MaterialUseVoltage Protection Level
Antistatic plasticBags1,500 V
Carbon-loaded plasticFloor mats7,500 V
Metallized laminateFloor mats5,000 V
4–8Maintenance and Service Guide
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