HP Compaq tc4400 Tablet PC User guide

Maintenance and Service

Guide

HP Compaq nc4400 Notebook PC

Document Part Number: 383207-002

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, 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.

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 nc4400 Notebook PC

Second Edition: May 2006

First Edition: March 2005

Document Part Number: 383207-002

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 . . . . . . . . . . . . . . . 3–11

3.4 Plastics Kit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3–13

3.5 Cable Kit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3–14

3.6 Miscellaneous (Not Illustrated). . . . . . . . . . . . . . . . 3–15

3.7 Sequential Part Number Listing . . . . . . . . . . . . . . . 3–17

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. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–11

5.6 Bluetooth Module . . . . . . . . . . . . . . . . . . . . . . . . . . 5–12

5.7 External Memory Module . . . . . . . . . . . . . . . . . . . . 5–14

5.8 Keyboard Cover . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–17

5.9 Keyboard. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–20

5.10 Fan. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–24

5.11 Heat Sink. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–25

5.12 Processor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–28

5.13 Internal Memory Module . . . . . . . . . . . . . . . . . . . 5–30

5.14 Mini Card WLAN Module . . . . . . . . . . . . . . . . . . 5–32

5.15 Display Assembly . . . . . . . . . . . . . . . . . . . . . . . . . 5–34

5.16 Button Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–48

5.17 Top Cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–51

5.18 TouchPad. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–55

5.19 Speaker . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–59

5.20 Infrared Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–61

5.21 System Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–63

5.22 Modem Module. . . . . . . . . . . . . . . . . . . . . . . . . . . 5–68

5.23 RTC Battery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–70

vi Maintenance and Service Guide

Contents

6 Specifications

A Screw Listing

B Software 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 nc4400 Notebook PC offers advanced

modularity, Intel® Core™ Duo and Celeron® M processors, and

extensive multimedia support.

HP Compaq nc4400 Notebook PC

1–2 Maintenance and Service Guide

Product Description

1.1 Features

■ Intel Core Duo T2600 (2.17-GHz), T2500 (2.00-GHz),

T2400 (1.83-GHz), and T2300 (1.67-GHz) or Intel

Celeron M 1.60-GHz processors, varying by computer model

■ 12.1-inch, XGA, TFT (1024 × 768) display with over

16.8 million colors

■ 100-, 80-, or 60-GB high-capacity hard drive, varying by

computer model

■ 256-MB DDR2 synchronous DRAM (SDRAM) at 633 MHz

and 533 MHz, expandable to 4.0 GB

■ Microsoft® Windows® XP Home Edition or Windows XP

Professional, varying by computer model

■ Full-size Windows keyboard with embedded numeric keypad

■ TouchPad and pointing stick pointing devices, including a

dedicated vertical scroll region

■ Integrated 10Base-T/100Base-T/1000Base-T Ethernet local

area network (LAN) network interface card (NIC) with RJ-45

jack

■ Integrated high-speed 56K modem with RJ-11 jack

■ Integrated wireless support for Mini Card 802.11b/g and

802.11a/b/g 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

Product Description

Maintenance and Service Guide 1–3

■ External 65-watt AC adapter with 3-wire power cord

■ 6-cell Li-Ion battery pack

■ Audio speaker

■ Volume up, volume mute, and volume down buttons

■ Connectors:

❏ Infrared

❏ Audio-out (headphone)

❏ Audio-in (microphone)

❏ Universal Serial Bus (USB) v. 2.0 (3 ports, 1 powered)

❏ Smart adapter power

❏ External monitor

❏ RJ-45 (network)

❏ RJ-11 (modem)

❏ S-Video-out

❏ PC Card

❏ Digital Media Slot

❏ Primary battery pack

❏ Accessory battery pack

❏ 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 5.21, “System

Board,” for more information on replacing the system board.

Before replacing the system board, perform the steps below to

be sure that 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).

2. Remove the real-time clock (RTC) battery (refer to

Section 5.23, “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

battery packs 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 Power Management

The computer comes with power management features that

extend battery pack 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 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 (WLAN)

device and/or Bluetooth® device, is turned

on.

2Power light ■ On: The computer is on.

■ Blinking green: The computer is in

standby.

■ Blinking rapidly: Wrong AC adapter is

connected. Connect an HP Smart AC

Adapter.

■ Off: The computer is off or in hibernation.

Product Description

Maintenance and Service Guide 1–7

3Battery light ■ Amber: A battery pack is charging.

■ Green: A battery pack is close to full

charge capacity.

■ Blinking amber: A battery pack that is the

only available power source has reached

a low-battery condition. When the battery

pack 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 battery packs 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 pack reaches a low-battery

condition, when the light begins blinking

amber.

4Drive light ■ 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 Display release button Opens the computer.

7 Internal microphone Records sound.

8 Fingerprint reader Allows a fingerprint logon to Windows

instead of using a password.

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

1Audio-out

(headphone) jack

Connects an optional headphone or

powered stereo speakers. Also connects

the audio function of an audio/video device,

such as a television or VCR.

2 Audio-in (microphone)

jack

Connects an optional monaural (single

sound channel) or stereo (dual sound

channel) microphone.

3 Powered USB port Connects USB 1.1- or 2.0-compliant

devices to the computer using a standard

USB cable, or connects an optional external

MultiBay or external MultiBay II to

the computer. This USB port is a powered

port that can be used without external

power.

4 PC Card slot or

optional smart card

reader

✎

On select computer models, the PC

Card slot may be replaced with an

optional smart card reader.

If your computer has

■ a PC Card slot, it supports optional

Type I, Type II, 32-bit (CardBus), or

16-bit PC Cards.

■ a smart card reader, it accepts smart

cards or Java™ Cards.

5 Digital Media Slot Supports Secure Digital (SD) Memory

Cards and MultiMediaCards (MMC).

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

Table 1-3

Left-Side Components

Item Component Function

1 Security cable slot Attaches an optional security cable to the

computer.

✎

The purpose of security solutions is

to act as deterrents. These

deterrents may not prevent a product

from being mishandled or stolen.

2 Vent Provides airflow to cool internal

components.

✎

To prevent overheating, do not

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.

✎

Depending on the computer model,

vents vary in number and location.

Product Description

Maintenance and Service Guide 1–11

3 Wireless button Turns the wireless functionality of the

WLAN or Bluetooth device on or off, but

does not establish a connection.

✎

To establish a wireless connection,

a wireless network must already be

set up.

4 USB port Connects a USB 1.1- and 2.0-compliant

device to the computer using a standard

USB cable.

5 Info Center button Launches Info Center, which enables you

to open various software solutions.

6 Power switch When the computer is

■ Off, slide toward the front of the

computer and release to turn on the

computer.

■ In standby, slide toward the front of the

computer and release to exit standby.

■ In hibernation, slide toward the front of

the computer and release to exit

hibernation.

If the computer has stopped responding

and Microsoft Windows shutdown

procedures cannot be used, slide toward

the front of the computer and hold for

4 seconds to turn off the computer.

7 Speaker Enables you to listen to music and hear

audio alerts and signals from programs.

Table 1-3

Left-Side Components

(Continued)

Item Component Function

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 USB port Connects USB 1.1- and 2.0-compliant

devices to the computer using a standard

USB cable.

2 RJ-11 (modem) jack Connects a modem cable. Enabled with

56-K connectivity.

3 RJ-45 (network) jack Connects a network cable. Enabled with

10BASE-T/100BASE-TX/1000BASE-T

connectivity.

4 Smart adapter power

connector

Connects an AC adapter, an optional

AC adapter, or an optional power cable.

5 External monitor port Connects an optional VGA external monitor

or projector.

6 S-Video-out jack Is a 7-pin, dual-purpose jack.

It connects an optional S-Video device,

such as a television, VCR, camcorder,

overhead projector, or video capture card,

with an optional, standard (4-pin) S-Video

cable.

The extra 3 pins also enable an optional

S-Video-to-composite adapter to be used

with the computer.

1–14 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

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