HP Compaq nc2400 Manual

Maintenance and Service
Guide
HP Compaq nc2400 Notebook PC
Document Part Number: 407949-002
August 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 2007 Hewlett-Packard Development Company, L.P.
Bluetooth is a trademark owned by its proprietor and used by
Hewlett-Packard Company under license. Intel and Core are trademarks or
registered trademarks of Intel Corporation or its subsidiaries in the United
States and other countries. Microsoft, Windows, and Windows Vista are
either trademarks or registered trademarks of Microsoft Corporation in the
United States and/or other countries. SD Logo is a trademark of its
proprietor.
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 nc2400 Notebook PC
Second Edition: August 2007
First Edition: May 2006
Document Part Number: 407949-002

MSG revision history
Revision Publication date Description
AJanuary 2010 The part number for the
Switch cover has been
corrected to 412754-001 in
the following locations:
“Computer Major
Components” on page 3-2,
“Sequential Part Number
Listing” on page 3-24, and
“Switch Cover” on page 5-27.

Maintenance and Service Guide v
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. . . . . . . . . . . . . . . . . . . . . . . . . . . 1–20
2 Troubleshooting
2.1 Computer Setup. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–1
Using Computer Setup . . . . . . . . . . . . . . . . . . . . . . . 2–1
Selecting from the File Menu . . . . . . . . . . . . . . . . . . 2–2
Selecting from the Security Menu . . . . . . . . . . . . . . 2–3
Selecting from the Diagnostics Menu. . . . . . . . . . . . 2–4
Selecting from the System Configuration Menu. . . . 2–5
2.2 Troubleshooting Flowcharts . . . . . . . . . . . . . . . . . . . 2–6
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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3–20
3.6 Mass Storage Devices . . . . . . . . . . . . . . . . . . . . . . . 3–21
3.7 Miscellaneous (Not Illustrated). . . . . . . . . . . . . . . . 3–22
3.8 Sequential Part Number Listing . . . . . . . . . . . . . . . 3–24

vi Maintenance and Service Guide
Contents
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
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 External Memory Module. . . . . . . . . . . . . . . . . . . . 5–12
5.7 Mini Card WLAN Module . . . . . . . . . . . . . . . . . . . 5–14
5.8 RTC Battery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–20
5.9 Bluetooth Module . . . . . . . . . . . . . . . . . . . . . . . . . . 5–21
5.10 Optical Drive. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–24
5.11 Switch Cover. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–27
5.12 Keyboard . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–30
5.13 Display Assembly . . . . . . . . . . . . . . . . . . . . . . . . . 5–35
5.14 Top Cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–44
5.15 Fingerprint Reader Board . . . . . . . . . . . . . . . . . . . 5–48
5.16 System Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–50
5.17 PC Card Assembly . . . . . . . . . . . . . . . . . . . . . . . . 5–56
5.18 Modem Module. . . . . . . . . . . . . . . . . . . . . . . . . . . 5–58
5.19 Speaker . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–60
5.20 Fan/Heat Sink Assembly. . . . . . . . . . . . . . . . . . . . 5–62

Contents
Maintenance and Service Guide vii
6 Specifications
A Screw Listing
B Backup and Recovery
C Display Component Recycling
D Connector Pin Assignments
E Power Cord Set Requirements
Index

Maintenance and Service Guide 1–1
1
Product Description
The HP Compaq nc2400 Notebook PC offers advanced
modularity, Intel® Core™ Duo, Pentium® M, and Celeron® M
processors, and extensive multimedia support.
HP Compaq nc2400 Notebook PC

1–2 Maintenance and Service Guide
Product Description
1.1 Features
■The following processors, varying by computer model:
❏Intel Core Duo U7600 (1.20-GHz)
❏Intel Core Duo U2500 (1.20-GHz)
❏Intel Core Duo U2400 (1.06-GHz)
❏Intel Pentium M 1200 (1.20-GHz)
❏Intel Pentium M 1100 (1.06-GHz)
❏Intel Celeron M 423 (1.06-GHz)
■12.1-inch, WXGA+WVA, TFT (1280 × 800) with over
16.8 million colors
■80-, 60-, 40-, 30-GB high-capacity hard drive, varying by
computer model
■256-MB DDR2 synchronous DRAM (SDRAM) at 533 MHz,
expandable to 2.0 GB
■Microsoft® Windows® XP Professional
■Full-size Windows keyboard with embedded numeric keypad
■Pointing stick pointing device
■Integrated 10 Base-T/100 Base-TX Ethernet local area
network (LAN) network interface card (NIC) with RJ-45 jack
■Integrated high-speed 56-K modem with RJ-11 jack

Product Description
Maintenance and Service Guide 1–3
■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 65-watt AC adapter with 3-wire power cord
■9-, 6-, or 3-cell Li-Ion battery, varying by computer model
■Audio speaker
■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:
❏Audio-out (headphone)
❏Audio-in (microphone)
❏Two Universal Serial Bus (USB) v. 2.0
❏SmartPower
❏External monitor
❏RJ-11 (modem)
❏RJ-45 (network)
❏IEEE 1394
❏Docking connector

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 5.14, “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. 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 5.8, “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.

Product Description
Maintenance and Service Guide 1–5
1.3 Power 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

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.
2 Power light ■On: The computer is on.
■Blinking: The computer is in standby.
■Blinking rapidly: An 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.
4 Drive light ■Blinking: The hard drive or optical drive is
being accessed.
■Amber: HP Mobile Data Protection with
accelerometer software has temporarily
parked the internal hard drive.
5 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
Table 1-2
Right-Side Components
Item Component Function
1 PC Card slot Supports optional Type or Type II 32-bit
(CardBus) or 16-bit PC Cards.
2 1394 port Connects an optional 1394a device such as
a scanner, digital camera, or digital
camcorder.
3 Audio-out
(headphone) jack
Connect optional headphones or powered
stereo speakers. Also connects the audio
function of an audio/video device such as
a television or VCR.
4 Audio-in
(microphone) jack
Connects an optional monaural
microphone.
5 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.
6 External monitor port Connects an optional VGA external monitor
or projector.
7 Docking connector Connects the computer to an optional
docking device.

Product Description
Maintenance and Service Guide 1–9
The external components on the left side of the computer are
shown below and described in Table 1-3.
Left-Side Components
Table 1-3
Left-Side Components
Item Component Function
1 Smart Adapter power
connector
Connects an AC adapter or an optional
power adapter.
2 RJ-11 (modem) jack Connects the modem cable.
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 Optical drive Supports an optical disc. The type of
optical drive varies by model.

1–10 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 1–11
Table 1-4
Rear Panel Components
Item Component Function
1 RJ-45 (network) jack Connects an optional network cable.
2 Battery bay Holds a battery.
3 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.

1–12 Maintenance and Service Guide
Product Description
The standard keyboard components of the computer are shown
below and described in Table 1-5.
Standard Keyboard Components

Product Description
Maintenance and Service Guide 1–13
Table 1-5
Rear Panel Components
Item Component Function
1f1 to f12 keys (12) Perform system and application tasks.
When combined with the fn key, several
keys and buttons perform additional tasks
as hotkeys.
2caps lock key Enables caps lock and turns on the caps
lock light.
3fn key Executes frequently used system
functions when pressed in combination
with a function key or the esc key.
4 Windows logo key In Windows, displays the Windows Start
menu.
5 Windows applications
key
In Windows, displays a shortcut menu for
items beneath the pointer.
6 Arrow keys Moves the cursor around the screen.
7 Keypad keys (15) In Windows, can be used like the keys
on an external numeric keypad.
8num lock key Enables numeric lock, turns on the
embedded numeric keypad, and turns on
the num lock light.

1–14 Maintenance and Service Guide
Product Description
The computer top components are shown below and described in
Table 1-6.
Top Components
Table 1-6
Top Components
Item Component Function
1 Power light ■On: The computer is on.
■Blinking: The computer is in standby.
■Blinking rapidly: An AC adapter with a
higher power rating should be
connected.
■Off: The computer is off or in
hibernation.