HP Compaq nc2400 Manuel

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.

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

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.

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