HP Compaq nw8440 Notebook PC
HP Compaq nc8430 Notebook PC
HP Compaq nx8420 Notebook PC
Document Part Number: 417790-002
September 2006
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. Bluetooth is a trademark owned by its proprietor and used by
Hewlett-Packard Company under license. SD Logo is a trademark of its
proprietor. Java is a trademark of Sun Microsystems Inc.
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 Compaq nw8440 Notebook PC
HP Compaq nc8430 Notebook PC
HP Compaq nx8420 Notebook PC
Second Edition: September 2006
First Edition: June 2006
Document Part Number: 417790-002
MSG revision history
RevisionPublication dateDescription
A
October 2010
The description for Top cover
part number 418807-001 has
been corrected to "For use
with nw8440 models without
fingerprint reader."
The description for Top cover
part number 416401-001 has
been corrected to "For use
with nw8440 models with
fingerprint reader."
The keyboard spare part
numbers have been updated.
The HP Compaq nw8440 Notebook PC, HP Compaq nc8430
Notebook PC, and HP Compaq nx8420 Notebook PC offer
advanced modularity, Intel® Core™ Duo processors, and
extensive multimedia support.
1
HP Compaq nw8440 Notebook PC, HP Compaq nc8430
Notebook PC, and HP Compaq nx8420 Notebook PC
Maintenance and Service Guide1–1
Product Description
1.1Fea tu re s
■ The following processors, varying by computer model:
❏ Intel Core Duo T2600 (2.17-GHz)
❏ Intel Core Duo T2500 (2.00-GHz)
❏ Intel Core Duo T2400 (1.83-GHz)
❏ Intel Core Duo T2300 (1.66-GHz)
■ The following displays are available, varying by
computer model:
❏ 15.4-inch, WUXGA, TFT (1920 × 1200) with over
16.8 million colors with AntiGlare
❏ 15.4-inch, WSXGA, TFT (1680 × 1050) with over
16.8 million colors with AntiGlare
❏ 15.4-inch, WXGA+, TFT (1440 × 900) with over
16.8 million colors with AntiGlare
■ 120-, 100-, 80-, and 60-GB high-capacity hard drive, varying
by computer model
■ 256-MB DDR2 synchronous DRAM (SDRAM) at 533 MHz
and 667 MHz, expandable to 4.0 GB
■ Microsoft® Windows® XP Professional
■ Full-size Windows keyboard with numeric keypad
■ TouchPad and pointing stick pointing devices, including a
dedicated vertical scroll region (select models only)
■ Integrated 10 Base-T/100 Base-TX 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 802.11a/b/g
or 802.11b/g Wireless LAN (WLAN) device
■ Support for one Type I or Type II PC Card slot, with support
for both 32-bit (CardBus) and 16-bit PC Cards, varying by
computer model
■ External 90-watt AC adapter with 3-wire power cord
■ 8-cell Li-Ion battery
■ Stereo speakers
■ Volume up, volume mute, and volume down buttons
■ Support for the following optical drives:
❏ DVD±RW and CD-RW Double-Layer Combo Drive
❏ DVD/CD-RW Combo Drive
❏ DVD-ROM drive
■ Connectors:
❏ Accessory battery
❏ Audio-in (microphone)
❏ Audio-out (headphone)
❏ Digital media slot
❏ Docking connector
❏ External monitor
❏ IEEE 1394
❏ RJ-11 (modem)
❏ RJ-45 (network)
❏ S-Video-out
❏ Smart Adapter power
❏ Three Universal Serial Bus (USB) v. 2.0
Maintenance and Service Guide1–3
Product Description
1.2Resetting the Computer
If the computer you are servicing has an unknown password,
follow the steps below to reset the password. These steps also
clear CMOS.
The following steps will not clear an unknown password if the
✎
stringent security option has been enabled in the BIOS. If
stringent security is enabled, the system board must be replaced
to reset an unknown password. Refer to Section 5.23, “Serial
Connector Module,” for more information on replacing the
system board.
Before replacing the system board, perform the steps below to
make sure stringent security has been properly enabled.
Enabling stringent security provides enhanced protection for the
power-on password and administrator password and other forms
of power-on authorization. Stringent security is enabled/disabled
by accessing the Password Options menu in the Computer Setup
utility. Refer to Section 2.1, “Computer Setup,” for more
information.
1. Prepare the computer for disassembly (refer to Section 5.3,
“Preparing the Computer for Disassembly,” for more
information). Remove the real-time clock (RTC) battery
(refer to Section 5.14, “RTC Battery,” for more information
on removing and replacing the RTC battery).
2. Wait approximately 5 minutes.
3. Replace the RTC battery and reassemble the computer.
4. Connect AC power to the computer. Do not reinsert any
batteries at this time.
5. Turn on the computer.
All passwords and all CMOS settings have been cleared.
1–4Maintenance and Service Guide
1. 3P o w e r M a n a g e m e n t
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. 4E x t e r n a l C o m p o n e n t s
The external components on the front of the computer are shown
below and described in Table 1-1.
Front Components
Table 1-1
Front Components
ItemComponentFunction
1Wireless lightOn: An integrated wireless device, such as
a wireless local area network (LAN) device
and/or a Bluetooth® device, is turned on.
2Power light■ On: The computer is on.
■ Blinking: The computer is in standby.
■ Blinking rapidly: An HP Smart AC
Adapter with a higher power rating
should be connected.
■ Off: The computer is off or in hibernation.
1–6Maintenance and Service Guide
Product Description
Table 1-1
Front Components (Continued)
ItemComponentFunction
3Battery light■ Amber: A battery is charging.
■ Green: A battery is close to full charge
capacity.
■ Blinking amber: A battery that is the only
available power source has reached a
low-battery condition. When the battery
reaches a critical low-battery condition,
the battery light begins blinking more
quickly.
■ Off: If the computer is connected to an
external power source, the light is turned
off when all batteries in the computer are
fully charged. If the computer is not
connected to an external power source,
the light is turned off until the battery
reaches a low-battery condition.
4Drive light■ Blinking green: The hard drive or optical
drive is being accessed.
■ Amber: HP Mobile Data Protection has
temporarily parked the hard drive.
5Display release latchOpens the computer.
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
Table 1-2
Right-Side Components
ItemComponentFunction
1Audio-out
(headphone) jack
2Internal microphoneRecords sound
3Audio-in
(microphone) jack
4USB ports (2)Connect USB 1.1- and 2.0-compliant
5Optical driveSupports an optical disc. The type of optical
6Serial portConnects an optional serial device.
1–8Maintenance and Service Guide
Produces computer sound when connected
to optional power stereo speakers,
headphones, ear buds, a headset, or
television audio.
Connects an optional computer headset
microphone, stereo array microphone, or
monaural microphone.
devices to the computer using a standard
USB cable, or connect an optional External
MultiBay II to the computer. The MultiBay II
must also be connected to an external
power source.
drive varies by model.
The external components on the rear panel of the computer are
shown below and described in Table 1-3.
Rear Panel Components
Table 1- 3
Rear Panel Components
ItemComponentFunction
1Battery bayHolds a battery.
2Smart adapter power
connector
Connects an AC adapter or an optional
power adapter.
Product Description
3External monitor portConnects an optional VGA external
Maintenance and Service Guide1–9
monitor or projector.
Product Description
The external components on the left side of the computer are
shown below and described in Table 1-4.
Left-Side Components
Table 1- 4
Left-Side Components
ItemComponentFunction
1Security cable slotAttaches an optional security cable to the
computer.
Security solutions are designed to
Ä
act as deterrents. These deterrents
may not prevent a product from being
mishandled or stolen.
2RJ-45 (network) jackConnects an optional network cable.
3RJ-11 (modem) jackConnects the modem cable.
4S-Video-out jackConnects an optional S-Video device, such
as a television, VCR, camcorder, projector,
or video capture card.
1–10Maintenance and Service Guide
Table 1- 4
Left-Side Components (Continued)
ItemComponentFunction
Product Description
5Exhaust ventProvides airflow to cool internal
61394 portConnects an optional 1394a device such as
7USB portConnects USB 1.1- and 2.0-compliant
8Smart card slotSupports optional smart cards and Java™
9PC Card slotSupports optional Type I or Type II 32-bit
10Digital Media SlotSupports Secure Digital (SD) Memory
components.
To prevent overheating, do not
Ä
obstruct vents. Use the computer
only a hard, flat surface. Do not allow
a hard surface, such as an adjoining
printer, or a soft surface, such as
pillows or thick rugs or clothing, to
block airflow.
a scanner, digital camera, or digital
camcorder.
devices to the computer using a standard
USB cable, or connects an optional
External MultiBay II to the computer. The
MultiBay II must also be connected to an
external power source.
Cards.
(CardBus) or 16-bit PC Cards.
Cards and MultiMediaCards.
Maintenance and Service Guide1–11
Product Description
The standard keyboard components of the computer are shown
below and described in Table 1-5.
Standard Keyboard Components
1–12Maintenance and Service Guide
Table 1- 5
Standard Keyboard Components
ItemComponentFunction
Product Description
1f1 to f12 keys (12)Perform system and application tasks.
2caps lock keyEnables caps lock and turns on the caps
3fnkeyExecutes frequently used system
4Windows logo keyIn Windows, displays the Windows
5Windows
applications key
6Arrow keysMoves the cursor around the screen.
7Keypad keysIn Windows, can be used like the keys
8num lock keyEnables numeric lock, turns on the
When combined with the fn key, several
keys and buttons perform additional tasks
as hotkeys.
lock light.
functions when pressed in combination
with a function key or the esc key.
Start menu.
In Windows, displays a shortcut menu
for items beneath the pointer.
on an external numeric keypad.
embedded numeric keypad, and turns
on the num lock light.
Maintenance and Service Guide1–13
Product Description
The computer top components are shown below and described in
Table 1-6.
Top Components, Part 1
1–14Maintenance and Service Guide
Product Description
Table 1- 6
Top Components
ItemComponentFunction
1Power buttonWhen the computer is:
■ Off, press to turn on the computer.
■ On, briefly press to initiate hibernation.
■ In standby, briefly press to resume from
standby.
■ In hibernation, briefly press to restore
from hibernation.
If the system has stopped responding and
Windows shutdown procedures cannot be
used, press and hold for 5 seconds to turn
off the computer.
2Info Center buttonLaunches Info Center, which enables you
to open various software solutions.
3Wireless button
(with wireless light)
Turns the wireless functionality on or off,
but does not create a wireless connection.
To establish a wireless connection,
✎
a wireless network must already be
set up.
4Presentation buttonStarts the presentation feature.
5Caps lock lightOn: caps lock is on.
6Num lock lightOn: num lock or the numeric keypad is on.
7Volume mute buttonMutes or restores speaker volume.
8Volume down buttondecreases speaker volume.
9Volume up buttonIncreases speaker volume.
Maintenance and Service Guide1–15
Product Description
The computer top components are shown below and described in
Table 1-7.
Top Components, Part 2
1–16Maintenance and Service Guide
Product Description
Table 1- 7
Top Components
ItemComponentFunction
1Display lid switch■ If the computer is closed while on, turns
off the display.
■ If the computer is opened while in
standby, turns on the computer
(resumes from standby).
2Pointing stick
(select models only)
3Stereo speakers (2)Produce stereo sound.
4TouchPadMoves the pointer and selects or activates
Moves the pointer and selects or activates
items on the screen.
items on the screen. Can be set to perform
other mouse functions, such as scrolling,
selecting, and double-clicking.
5TouchPad buttonsFunction like the left, middle, and right
6Fingerprint readerAllows a fingerprint logon to Windows
7TouchPad scroll zoneScrolls up or down.
8Pointing stick buttons
(select models only)
Maintenance and Service Guide1–17
buttons on an external mouse.
instead of using a password.
Function like the left, middle, 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 1-8.
Bottom Components
1–18Maintenance and Service Guide
Product Description
Table 1- 8
Bottom Components
ItemComponentFunction
1Battery bayHolds the battery.
2Battery release latches (2)Secure the battery in the battery bay.
3Accessory battery
connector
4Memory module
compartment
5Hard drive bayHolds the primary hard drive.
Connects an optional HP Ultra-Capacity
Battery or HP Extended Life Battery.
Contains one memory slot that supports
replaceable memory modules.
6Docking connectorConnects the computer to an optional
7Exhaust ventProvides airflow to cool internal
docking device.
components.
To prevent overheating, do not
Ä
obstruct vents. Use the computer
only a hard, flat surface. Do not
allow a hard surface, such as an
adjoining printer, or a soft
surface, such as pillows or thick
rugs or clothing, to block airflow.
Maintenance and Service Guide1–19
Product Description
1. 5D e s i g n O v e r v i ew
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:
■ Audio
■ Digital Media Slot
■ Display
■ Hard drive
■ Intel Core Duo processors
■ Keyboard, pointing stick, and TouchPad
■ Memory modules
■ Mini Card module
■ Optical drive
■ PC Card
■ Smart Adapter AC adapter
■ Smart card
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.
1–20Maintenance and Service Guide
Troubleshooting
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.
2.1Computer Setup
Computer Setup is a system information and customization utility
that can be used even when the operating system is not working
or will not load. This utility includes settings that are not
available in Windows.
2
Using Computer Setup
Information and settings in Computer Setup are accessed from
the Main, Security, Advanced, or Tools menus:
1. Turn on or restart the computer. Press
F10 = ROM-Based Setup message is displayed in
the lower-left corner of the screen.
❏ To change the language, use the cursor control keys
to navigate to the Advanced menu.
❏ To view navigation information, press f1.
❏ To return to the Computer Setup menu, press esc.
Maintenance and Service Guide2–1
f10while the
Troubleshooting
2. Select the Main, Security, Advanced, or Tool s menu.
3. To close Computer Setup and restart the computer:
❏ Select Exit > Exit Saving Changes, and then press enter.
– or –
❏ Select Exit > Exit Discarding Changes, and then
enter.
press
– or –
❏ Select Exit > Load Setup Defaults, and then press enter.
4. When you are prompted to confirm your action, press
Selecting from the File Menu
Table 2- 1
File Menu
SelectTo Do This
System Information■ Change the system time and system date.
■ View identification information about the
computer.
■ View specification information about the
processor, memory and cache size, and
system ROM.
f10.
2–2Maintenance and Service Guide
Troubleshooting
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.
DriveLock PasswordsEnable/disable DriveLock; change a DriveLock
user or master password.
DriveLock Settings are accessible only
✎
when you enter Computer Setup by turning
on (not restarting) the computer.
Password Options
(Password options can
be selected only when
a power-on password
has been set.)
Device SecurityEnable/disable
*Not applicable to SuperDisk LS-120 drives.
Maintenance and Service Guide2–3
Enable/disable
■ QuickLock.
■ QuickLock on Standby.
■ QuickBlank.
To enable QuickLock on Standby or
✎
QuickBlank, you must first enable
QuickLock.
■ Diskette drive startup.*
■ CD-ROM or diskette startup.
Settings for a DVD-ROM can be entered
✎
in the CD-ROM field.
Troubleshooting
Selecting from the Advanced Menu
Table 2- 3
Advanced Menu
SelectTo Do This
LanguageChange the Computer Setup language.
Boot OrderEnable/disable MultiBoot, which sets a startup
sequence that can include most bootable devices
and media in the system.
Accessibility OptionsAllows electronic and information technology to
be accessible to people with varying ranges of
abilities.
Video MemoryDisplays the amount of video memory available
on the computer.
Selecting from the Tools Menu
Table 2- 4
Tools Menu
SelectTo Do This
Hard Drive Self TestRun a quick comprehensive self test on hard
drives in the system that support the test features.
416416-001Keyboard with pointing stick for use in the United States
416416-031Keyboard with pointing stick for use in the United Kingdom
416416-041Keyboard with pointing stick for use in Germany
416416-051Keyboard with pointing stick for use in France
416416-061Keyboard with pointing stick for use in Italy
416416-071Keyboard with pointing stick for use in Spain
416416-081Keyboard with pointing stick for use in Denmark
416416-091Keyboard with pointing stick for use in Norway
416416-101Keyboard with pointing stick for use in Sweden
416416-111Keyboard with pointing stick for use in Switzerland
416416-121Keyboard with pointing stick for use in French Canada
416416-131Keyboard with pointing stick for use in Portugal
416416-141Keyboard with pointing stick for use in Turkey
416416-151Keyboard with pointing stick for use in Greece
416416-161Keyboard with pointing stick for use in Latin America
416416-171Keyboard with pointing stick for use in Saudi Arabia
Maintenance and Service Guide3–27
Illustrated Parts Catalog
Table 3- 5
Sequential Part Number Listing (Continued)
Spare Part
NumberDescription
416416-201Keyboard with pointing stick for use in Brazil
416416-211Keyboard with pointing stick for use in Hungary
416416-221Keyboard with pointing stick for use in the Czech Republic
416416-231Keyboard with pointing stick for use in Slovakia
416416-251Keyboard with pointing stick for use in Russia
416416-281Keyboard with pointing stick for use in Thailand
416416-291Keyboard with pointing stick for use in Japan
416416-AB1Keyboard with pointing stick for use in Taiwan
416416-AD1Keyboard with pointing stick for use in Korea
416416-B31Keyboard with pointing stick for use internationally
416416-BA1Keyboard with pointing stick for use in Slovenia
416416-BB1Keyboard with pointing stick for use in Israel
416416-DD1Keyboard with pointing stick for use in Iceland
416417-001Keyboard without pointing stick for use in the United States
416417-161Keyboard without pointing stick for use in Latin America
416417-201Keyboard without pointing stick for use in Brazil
416417-281Keyboard without pointing stick for use in Thailand
416417-291Keyboard without pointing stick for use in Japan
416417-AB1Keyboard without pointing stick for use in Taiwan
416417-AD1Keyboard without pointing stick for use in Korea
416419-001Screw Kit
416420-001Plastics Kit
3–28Maintenance and Service Guide
Illustrated Parts Catalog
Table 3- 5
Sequential Part Number Listing (Continued)
Spare Part
NumberDescription
416421-02190-watt AC adapter
417505-0011-DIMM, PC2-4200, 2048 MB memory module
417506-0011-DIMM, PC2-5300, 2048 MB memory module
417507-0017200-rpm, 80-GB hard drive
418807-001Top cover for use with nw8440 models without fingerprint
reader (includes speakers)
Maintenance and Service Guide3–29
Removal and Replacement
This chapter provides essential information for proper and
safe removal and replacement service.
4.1Tools Required
You will need the following tools to complete the removal and
replacement procedures:
■ Magnetic screwdriver
■ Phillips P0 and P1 screwdrivers
■ Torx8 screwdriver
■ Flat-bladed screwdriver
■ Hex 5.0-mm socket drive for system board screw locks
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, be sure 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. Be sure the 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, be sure that
a diskette or disc is not in the drive and be sure that the optical
drive tray is closed.
■ Before handling a drive, be sure 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, an optical 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. Be sure 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 fixtures must directly contact dissipative surfaces, use
fixtures made only 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.
Table 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
5
Removal and Replacement
Procedures
This chapter provides removal and replacement procedures.
There are as many as 72 screws and screw locks, in 14 different
sizes and types, that may have to be removed, replaced, or
loosened when servicing the computer. Make special note of each
screw and screw lock size and location during removal and
replacement.
Refer to Appendix A, “Screw Listing,” for detailed information
on screw and screw lock sizes, locations, and usage.
Maintenance and Service Guide5–1
Removal and Replacement Procedures
5.1Serial Number
Report the computer serial number to HP when requesting
information or ordering spare parts. The serial number is
located on the bottom of the computer.
Serial Number Location
5–2Maintenance and Service Guide
Removal and Replacement Procedures
5.2 Disassembly Sequence Chart
Use the chart below to determine the section number to be
referenced when removing computer components.
Disassembly Sequence Chart
SectionDescription
5.3Preparing the Computer for
Disassembly
Battery
5.4Hard Drive2 loosened to remove the
5.5Computer Feet0
5.6Optical Drive1 to remove the optical drive
5.7External Memory Module1 loosened to remove the
5.8Bluetooth Module1 loosened to remove the
5.9Keyboard2
5.10Fan Assembly4 loosened on fan assembly
# of Screws Removed
0
0
hard drive cover
1 loosened to remove the
hard drive
4 to disassemble hard drive
2 to remove the optical drive
bracket
memory module
compartment cover
Bluetooth module cover
2 removed to remove
Bluetooth module
4 removed on thermal plate
5.11Heat Sink4 loosened
5.12Processor1 loosened
Maintenance and Service Guide5–3
Removal and Replacement Procedures
Disassembly Sequence Chart (Continued)
SectionDescription
5.13Internal Memory Module0
5.14RTC Battery0
5.15TouchPad1
5.16Mini Card Module2
5.17Switch Cover3
5.18Display Assembly8
To prevent an unresponsive system and the display of a
Å
warning message, install only a Mini Card device
authorized for use in your computer by the governmental
agency that regulates wireless devices in your country. If
you install a device and then receive a warning message,
remove the device to restore computer functionality. Then
contact Customer Care.
5.19To p C ove r16 screws
5.20Modem Module2
5.21System Board4 screws
5.22System Board Frame2 screw locks
5.23Serial Connector Module0
# of Screws Removed
2 screw locks
3 screws
5.26USB/Audio Board2
5–4Maintenance and Service Guide
Removal and Replacement Procedures
5.3 Preparing the Computer for
Disassembly
Before you begin any removal or installation procedures:
1. 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.
2. Disconnect all external devices connected to the computer.
3. Disconnect the power cord.
Battery Spare Part Number Information
8-cell, 4.8-AHr372771-001
4. Remove the battery by following these steps:
a. Turn the computer upside down with the rear panel
toward you.
b. Slide the battery release latch on the right 1 and then the
battery release latch on the left 2 to release the battery.
c. Slide the battery pack 3 straight back and remove it.
Removing the Battery Pack
Reverse the above procedure to install the battery pack.
Maintenance and Service Guide5–5
Removal and Replacement Procedures
5.4 Hard Drive
Hard Drive Spare Part Number Information
7200 rpm
100 GB
80 GB
416415-001
417507-001
5400 rpm
120 GB
100 GB
80 GB
60 GB
1. Prepare the computer for disassembly (Section 5.3).
416414-001
413853-001
413852-001
413851-001
5–6Maintenance and Service Guide
Removal and Replacement Procedures
2. Loosen the two Phillips PM2.0×5.0 screws 1 that secure the
hard drive cover to the computer.
3. Lift the left side of the hard drive cover 2 and swing it to
the right.
4. Remove the hard drive cover.
The hard drive cover is included in the Plastics Kit, spare part
✎
number 417527-001.
Removing the Hard Drive Cover
Maintenance and Service Guide5–7
Removal and Replacement Procedures
5. Loosen the Phillips PM2.5×13.0 spring-loaded hard drive
retention screw 1.
6. Grasp the mylar tab 2 on the left side of the hard drive and
slide the hard drive to the right 3 to disconnect it from the
system board.
7. Remove the hard drive 4 from the hard drive bay.
Removing the Hard Drive
5–8Maintenance and Service Guide
Removal and Replacement Procedures
8. Remove the four Phillips PM3.0×3.0 screws 1 that secure the
hard drive frame to the hard drive.
9. Lift the frame 2 straight up to remove if from the hard drive.
Removing the Hard Drive Frame
Reverse the above procedure to reassemble and install the
hard drive.
Maintenance and Service Guide5–9
Removal and Replacement Procedures
5.5 Computer Feet
The computer feet are adhesive-backed rubber pads. The feet are
included in the Plastics Kit, spare part number 417527-001.
Replacing the Computer Feet
5–10Maintenance and Service Guide
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