HP Compaq NX7300 Manual

Maintenance and Service
Guide
HP Compaq nx7300 and nx7400 Notebook PC
Document Part Number: 410775-002
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.

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.
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 nx7300 and nx7400 Notebook PC
Second Edition: March 2007
First Edition: May 2006
Document Part Number: 410775-002
© Copyright 2007 Hewlett-Packard Development Company, L.P.
2006,

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 iii
Contents
1 Product Description
1.1 Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–2
1.2 Resetting the Computer. . . . . . . . . . . . . . . . . . . . . . . 1–5
1.3 Power Management. . . . . . . . . . . . . . . . . . . . . . . . . . 1–6
1.4 External Components . . . . . . . . . . . . . . . . . . . . . . . . 1–7
1.5 Design Overview. . . . . . . . . . . . . . . . . . . . . . . . . . . 1–20
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

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 Plastics Kit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3–14
3.4 Mass Storage Devices . . . . . . . . . . . . . . . . . . . . . . . 3–16
3.5 Miscellaneous (Not Illustrated). . . . . . . . . . . . . . . . 3–18
3.6 Sequential Part Number Listing . . . . . . . . . . . . . . . 3–21
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 Optical Drive. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–12
5.7 External Memory Module . . . . . . . . . . . . . . . . . . . . 5–14
5.8 Bluetooth Module . . . . . . . . . . . . . . . . . . . . . . . . . . 5–17
5.9 Keyboard. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–19
5.10 Thermal Plate . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–23
5.11 Fan Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–24
5.12 Heat Sink. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–25
5.13 Processor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–28
5.14 Mini Card Module. . . . . . . . . . . . . . . . . . . . . . . . . 5–30
5.15 Internal Memory Module . . . . . . . . . . . . . . . . . . . 5–33
5.16 RTC Battery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–35
5.17 Switch Cover. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–36
5.18 Display Assembly . . . . . . . . . . . . . . . . . . . . . . . . . 5–39
5.19 Top Cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–43
5.20 Modem Module. . . . . . . . . . . . . . . . . . . . . . . . . . . 5–47
5.21 System Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–49
5.22 System Board Frame (full-featured models only). 5–56
5.23 USB/Audio Board . . . . . . . . . . . . . . . . . . . . . . . . . 5–59

Contents
Maintenance and Service Guide vi
6 Specifications
AScrewListing
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 nx7300 and nx7400 Notebook PC offers
advanced modularity, Intel® Core™ Duo, Core Solo, Celeron®,
and Celeron M processors, and extensive multimedia support.
HP Compaq dx7300 and nx7400 Notebook PC

1–2 Maintenance and Service Guide
Product Description
1.1 F e 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 (2.0-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 T2250 (1.73-GHz) processor
❏Intel Core Duo T2050 (1.6-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 T1350 (1.86-GHz) processor
❏Intel Core Solo T1300 (1.66-GHz) processor
❏Intel Celeron M 450 (2.0-GHz) processor
❏Intel Celeron M 430 (1.73-GHz) processor
❏Intel Celeron M 420 (1.60-GHz) processor
❏Intel Celeron M 410 (1.46-GHz) processor
■The following displays are available, varying by
computer model:
❏15.4-inch, WSXGA+, TFT (1680 × 1050) with over
16.8 million colors with BrightView
❏15.4-inch, WSXGA+, TFT (1680 × 1050) with over
16.8 million colors
❏15.4-inch, WXGA+, TFT (1440 × 900) with over
16.8 million colors

Product Description
Maintenance and Service Guide 1–3
■120-, 100-, 80-, 60-, and 40-GB high-capacity hard drives,
varying by computer model
■256-MB DDR2 synchronous DRAM (SDRAM) at 533 MHz
and 667 MHz, expandable to 4.0 GB
■Microsoft® Windows® XP Professional
■Full-size Windows keyboard with numeric keypad
■TouchPad pointing device, 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
■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, 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
■6-cell Li-Ion battery
■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/CD-RW Combo Drive
❏DVD-ROM drive
❏CD-ROM drive

1–4 Maintenance and Service Guide
Product Description
■Connectors:
❏Accessory battery
❏Audio-in (microphone)
❏Audio-out (headphone)
❏Docking connector
❏External monitor
❏IEEE 1394
❏RJ-11 (modem)
❏RJ-45 (network)
❏S-Video-out
❏Smart Adapter power
❏Three Universal Serial Bus (USB) v. 2.0

Product Description
Maintenance and Service Guide 1–5
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
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, “Starting 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 5.16, “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.

1–6 Maintenance and Service Guide
Product Description
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

Product Description
Maintenance and Service Guide 1–7
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.

1–8 Maintenance and Service Guide
Product Description
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 green: The hard drive or optical
drive is being accessed.
5 Display release latch Opens the computer.
Table 1-1
Front Components
(Continued)
Item Component Function

Product Description
Maintenance and Service Guide 1–9
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
1Audio-out
(headphone) jack
Produces computer sound when connected
to optional power stereo speakers,
headphones, ear buds, a headset, or
television audio.
2Audio-in
(microphone) jack
Connects an optional computer headset
microphone, stereo array microphone, or
monaural microphone.
3 Optical drive Supports an optical disc. The type of optical
drive varies by computer model.
4 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.

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 1-3.
Rear Panel Components
Table 1-3
Rear Panel Components
Item Component Function
1 Battery bay Holds a battery.
2 Smart adapter power
connector
Connects an AC adapter or an optional
power adapter.
3 External monitor port Connects an optional VGA external
monitor or projector.

Product Description
Maintenance and Service Guide 1–11
The external components on the left side of the computer are
shown below and described in Table 1-4.
Left-Side Components
Table 1-4
Left-Side 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 RJ-45 (network) jack Connects an optional network cable.

1–12 Maintenance and Service Guide
Product Description
3 RJ-11 (modem) jack Connects the modem cable.
4 Exhaust vent Provides airflow to cool internal
components.
5 1394 port Connects an optional 1394a device such
as a scanner, digital camera, or digital
camcorder.
6 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.
7 PC Card slot Supports optional Type I or Type II 32-bit
(CardBus) or 16-bit PC Cards.
Table 1-4
Left-Side Components
(Continued)
Item Component Function

Product Description
Maintenance and Service Guide 1–13
The standard keyboard components of the computer are shown
below and described in Table 1-5.
Standard Keyboard Components