HP Compaq nc2400 Manual

Maintenance and Service
Guide
HP Compaq nc2400 Notebook PC
Document Part Number: 407949-001
May 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.

© Copyright 2006 Hewlett-Packard Development Company, L.P.
Microsoft and Windows are U.S. registered trademarks of Microsoft
Corporation. Intel, Pentium, and Celeron 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.
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
First Edition: May 2006
Document Part Number: 407949-001

Maintenance and Service Guide iii
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

iv 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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3–20
3.6 Mass Storage Devices . . . . . . . . . . . . . . . . . . . . . . . 3–21
3.7 Miscellaneous (Not Illustrated). . . . . . . . . . . . . . . . 3–22
3.8 Sequential Part Number Listing . . . . . . . . . . . . . . . 3–24
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 v
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. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–12
5.6 External Memory Module . . . . . . . . . . . . . . . . . . . . 5–12
5.7 Mini Card WLAN Module . . . . . . . . . . . . . . . . . . . 5–15
5.8 RTC Battery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–21
5.9 Bluetooth Module . . . . . . . . . . . . . . . . . . . . . . . . . . 5–22
5.10 Optical Drive. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–25
5.11 Switch Cover. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–28
5.12 Keyboard . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–31
5.13 Display Assembly . . . . . . . . . . . . . . . . . . . . . . . . . 5–36
5.14 Top Cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–45
5.15 Fingerprint Reader Board . . . . . . . . . . . . . . . . . . . 5–50
5.16 System Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–52
5.17 PC Card Assembly . . . . . . . . . . . . . . . . . . . . . . . . 5–58
5.18 Modem Module. . . . . . . . . . . . . . . . . . . . . . . . . . . 5–60
5.19 Speaker . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–62
5.20 Fan/Heat Sink Assembly. . . . . . . . . . . . . . . . . . . . 5–64

vi Maintenance and Service Guide
Contents
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® 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 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
■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 prtotection 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.