HP Nc6400 - Compaq Business Notebook Manual

Maintenance and Service
Guide
HP Compaq nc6400 Notebook PC
Document Part Number: 406847-003
March 2007
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.

© Copyright 2006, 2007 Hewlett-Packard Development Company, L.P.
Microsoft, Windows, and Windows Vista are either trademarks or
registered trademarks of Microsoft Corporation in the United States or
other countries. Intel, Celeron, 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. AMD, the AMD
Arrow logo and combinations thereof are trademarks of Advanced Micro
Devices, 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 nc6400 Notebook PC
Third Edition: March 2007
First Edition: May 2006
Document Part Number: 406847-003

Safety warning notice
ÅWARNING: To reduce the possibility of heat-related injuries or of
overheating the computer, do not place the computer directly on your
lap or obstruct the computer air 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 rugs or clothing, to
block airflow. Also, do not allow the AC adapter to contact the skin or
a soft surface, such as pillows or rugs or clothing, during operation. The
computer and the AC adapter complies with the user-accessible surface
temperature limits defined by the International Standard for Safety of
Information Technology Equipment (IEC 60950).

Maintenance and Service Guide iv
Contents
1 Product Description
1.1 Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–2
1.2 Resetting the Computer. . . . . . . . . . . . . . . . . . . . . . . 1–4
1.3 Power Management. . . . . . . . . . . . . . . . . . . . . . . . . . 1–5
1.4 External Components . . . . . . . . . . . . . . . . . . . . . . . . 1–6
1.5 Design Overview. . . . . . . . . . . . . . . . . . . . . . . . . . . 1–24
2Troubleshooting
2.1 Starting Computer Setup. . . . . . . . . . . . . . . . . . . . . . 2–1
Navigating and selecting in Computer Setup . . . . . . 2–2
Restoring Factory Settings in Computer Setup. . . . . 2–3
File Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–4
Security Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–5
Diagnostics Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–7
System Configuration Menu . . . . . . . . . . . . . . . . . . . 2–7
2.2 Troubleshooting Flowcharts . . . . . . . . . . . . . . . . . . 2–10

v Maintenance and Service Guide
Contents
3 Illustrated Parts Catalog
3.1 Serial Number Location . . . . . . . . . . . . . . . . . . . . . . 3–1
3.2 Computer Major Components. . . . . . . . . . . . . . . . . . 3–2
3.3 Display Assembly Components . . . . . . . . . . . . . . . 3–16
3.4 Plastics Kit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3–18
3.5 Cable Kit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3–19
3.6 Mass Storage Devices . . . . . . . . . . . . . . . . . . . . . . . 3–20
3.7 Miscellaneous (Not Illustrated). . . . . . . . . . . . . . . . 3–21
3.8 Sequential Part Number Listing . . . . . . . . . . . . . . . 3–23
4 Removal and Replacement Preliminaries
4.1 Tools Required . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4–1
4.2 Service Considerations . . . . . . . . . . . . . . . . . . . . . . . 4–2
Plastic Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4–2
Cables and Connectors . . . . . . . . . . . . . . . . . . . . . . . 4–2
4.3 Preventing Damage to Removable Drives . . . . . . . . 4–3
4.4 Preventing Electrostatic Damage . . . . . . . . . . . . . . . 4–4
4.5 Packaging and Transporting Precautions . . . . . . . . . 4–5
4.6 Workstation Precautions . . . . . . . . . . . . . . . . . . . . . . 4–6
4.7 Grounding Equipment and Methods . . . . . . . . . . . . . 4–7

Contents
Maintenance and Service Guide vi
5 Removal and Replacement Procedures
5.1 Serial Number . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–2
5.2 Disassembly Sequence Chart . . . . . . . . . . . . . . . . . . 5–3
5.3 Preparing the Computer for Disassembly . . . . . . . . . 5–5
5.4 Hard Drive. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–7
5.5 Computer Feet. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–11
5.6 Bluetooth Module . . . . . . . . . . . . . . . . . . . . . . . . . . 5–12
5.7 External Memory Module . . . . . . . . . . . . . . . . . . . . 5–14
5.8 Mini Card WLAN Module . . . . . . . . . . . . . . . . . . . 5–17
5.9 MultiBay II Device . . . . . . . . . . . . . . . . . . . . . . . . . 5–21
5.10 Keyboard . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–23
5.11 RTC Battery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–28
5.12 Internal Memory Module . . . . . . . . . . . . . . . . . . . 5–29
5.13 Modem Module. . . . . . . . . . . . . . . . . . . . . . . . . . . 5–31
5.14 Mini Card WWAN Module . . . . . . . . . . . . . . . . . 5–33
5.15 Switch Cover. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–35
5.16 Power Button Board . . . . . . . . . . . . . . . . . . . . . . . 5–37
5.17 Fan Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–38
5.18 Heat Sink. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–39
5.19 Processor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–42
5.20 Display Assembly . . . . . . . . . . . . . . . . . . . . . . . . . 5–44
5.21 Top Cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–55
5.22 PC Card/Digital Media Board. . . . . . . . . . . . . . . . 5–61
5.23 Speaker . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–64
5.24 Microphone . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–66
5.25 System Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–68
5.26 MultiBay II Eject Assembly . . . . . . . . . . . . . . . . . 5–77

vii Maintenance and Service Guide
Contents
6 Specifications
A ScrewListing
B Backup and Recovery in Windows Vista
C Backup and Recovery in Windows XP
D Display Component Recycling
E Connector Pin Assignments
F Power Cord Set Requirements
Index

Maintenance and Service Guide 1–1
1
Product Description
The HP Compaq nc6400 Notebook PC offers advanced
modularity, Intel® Core™ Duo, Core Solo, and Celeron®
processors, and extensive multimedia support.
HP Compaq nc6400 Notebook PC

1–2 Maintenance and Service Guide
Product Description
1.1 Fe a t u r e s
■The following processors, varying by computer model:
❏Intel Core Duo T7600 (2.33-GHz) processor
❏Intel Core Duo T7400 (2.16-GHz) processor
❏Intel Core Duo T7200 (2.00-GHz) processor
❏Intel Core Duo T5600 (1.83-GHz) processor
❏Intel Core Duo T5500 (1.66-GHz) processor
❏Intel Core Duo T2300E (1.66-GHz) processor
❏Intel Core Duo T2600 (2.17-GHz) processor
❏Intel Core Duo T2500 (2.00-GHz) processor
❏Intel Core Duo T2400 (1.83-GHz) processor
❏Intel Core Duo T2300 (1.67-GHz) processor
❏Intel Core Solo T1300 (1.66-GHz) processor
❏Intel Celeron M 440 (1.80-GHz) processor
❏Intel Celeron M 430 (1.73-GHz) processor
■14.1-inch, WXGA+, TFT (1440 × 900) and 14.1-inch,
WXGA, TFT (1440 × 900) display, with over 16.8 million
colors, varying by computer model
■120-, 100-, 80-, 60-, and 40-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 Vista™ Business, Windows Vista
Home Basic, and Windows® XP Professional
■Full-size Windows keyboard with numeric keypad
■TouchPad and pointing stick pointing devices, including a
dedicated vertical scroll region
■Integrated 10 Base-T/100 Base-TX Ethernet local area
network (LAN) network interface card (NIC) with RJ-45 jack

Product Description
Maintenance and Service Guide 1–3
■Integrated high-speed 56K modem with RJ-11 jack
■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- and 65-watt AC adapters with 3-wire power
cord, varying by computer model
■8-cell and 4-cell Li-Ion batteries
■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±RW and 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
❏SmartPower
❏Three Universal Serial Bus (USB) v. 2.0

1–4 Maintenance and Service Guide
Product Description
1.2 Resetting 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 5.21, “Top
Cover,” 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.
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 5.11, “RTC Battery,” for more information on
removing and replacing the RTC battery).
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.

Product Description
Maintenance and Service Guide 1–5
1. 3 Powe 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

1–6 Maintenance and Service Guide
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
Table 1-1
Front Components
Item Component Function
1 Wireless light On: An integrated wireless device, such as
a wireless local area network (LAN) device
and/or a Bluetooth® device, is turned on.
2Powerlight ■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.

Product Description
Maintenance and Service Guide 1–7
3 Battery 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.
4Drivelight ■Blinking green: The hard drive or optical
drive is being accessed.
■Amber: HP Mobile Data Protection has
temporarily parked the hard drive.
5 Infrared port Provides wireless communication between
the computer and an optional
IrDA-compliant device.
6 Digital Media Slot Supports Secure Digital (SD) Memory
Cards and MultiMediaCards (MMC).
7 Stereo speakers (2) Produce stereo sound.
8 Display release latch Opens the computer.
Table 1-1
Front Components
(Continued)
Item Component Function

1–8 Maintenance and Service Guide
Product Description
The external components on the right side of the computer are
shown below and described in Table 1-2.
Right-Side Components

Product Description
Maintenance and Service Guide 1–9
Table 1-2
Right-Side Components
Item Component Function
1 Smart card slot Supports optional smart cards and Java™
Cards.
2 MultiBay II device Supports an optical disc. The type of optical
drive varies by computer model.
3 USB port Connects USB 1.1- and 2.0-compliant
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.
4 RJ-45 (network) jack Connects an optional network cable.
5 RJ-11 (modem) jack Connects the modem cable.

1–10 Maintenance and Service Guide
Product Description
The external components on the left side of the computer are
shown below and described in Table 1-3.
Left-Side Components

Product Description
Maintenance and Service Guide 1–11
Table 1-3
Left-Side Components
Item Component Function
1 Exhaust vent Provides airflow to cool internal
components.
2 USB ports (2) Connect USB 1.1- and 2.0-compliant
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.
3Audio-in
(microphone) jack
Connects an optional computer headset
microphone, stereo array microphone, or
monaural microphone.
4Audio-out
(headphone) jack
Produces computer sound when connected
to optional power stereo speakers,
headphones, ear buds, a headset, or
television audio.
5 PC Card slot Supports optional Type I or Type II 32-bit
(CardBus) or 16-bit PC Cards.

1–12 Maintenance and Service Guide
Product Description
The external components on the rear panel of the computer are
shown below and described in Table 1-4.
Rear Panel Components

Product Description
Maintenance and Service Guide 1–13
Table 1-4
Rear Panel Components
Item Component Function
1 Security cable slot Attaches an optional security cable to the
computer.
ÄSecurity solutions are designed to
act as deterrents. These deterrents
may not prevent a product from
being mishandled or stolen.
2 Battery bay Holds a battery.
3 Smart adapter power
connector
Connects an AC adapter or an optional
power adapter.
4 S-Video-out jack Connects an optional S-Video device,
such as a television, VCR, camcorder,
projector, or video capture card.
5 External monitor port Connects an optional VGA external
monitor or projector.