Maintenance and Service
Guide
HP Compaq nx8220 Notebook PC
HP Compaq nw8240 Notebook PC
HP Compaq nc8230 Notebook PC
Document Part Number: 372658-002
October 2005
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.
1.2 Resetting the Computer. . . . . . . . . . . . . . . . . . . . . . . 1–5
1.3 Power Management. . . . . . . . . . . . . . . . . . . . . . . . . . 1–5
1.4 External Components . . . . . . . . . . . . . . . . . . . . . . . . 1–6
1.5 Design Overview. . . . . . . . . . . . . . . . . . . . . . . . . . . 1–20
Selecting from the Security Menu . . . . . . . . . . . . . . 2–4
Selecting from the Tools Menu. . . . . . . . . . . . . . . . . 2–5
Selecting from the Advanced Menu . . . . . . . . . . . . . 2–6
2.2 Troubleshooting Flowcharts . . . . . . . . . . . . . . . . . . . 2–7
3 Software Update and Recovery
3.1 Software Updates . . . . . . . . . . . . . . . . . . . . . . . . . . . 3–1
Accessing Computer Information . . . . . . . . . . . . . . . 3–2
Obtaining the Support Software CD. . . . . . . . . . . . . 3–3
Software Updates and the HP Web Site . . . . . . . . . . 3–3
Maintenance and Service Guide
iii
Contents
Reinstalling Applications . . . . . . . . . . . . . . . . . . . . . 3–9
Repairing the Operating System . . . . . . . . . . . . . . . 3–10
Reinstalling the Operating System . . . . . . . . . . . . . 3–12
Reinstalling Device Drivers and Other Software . . 3–14
4.4 Miscellaneous Cable Kit . . . . . . . . . . . . . . . . . . . . . 4–15
4.5 Mass Storage Devices . . . . . . . . . . . . . . . . . . . . . . . 4–16
4.6 Miscellaneous (Not Illustrated). . . . . . . . . . . . . . . . 4–17
4.7 Sequential Part Number Listing . . . . . . . . . . . . . . . 4–19
5.3 Preventing Damage to Removable Drives . . . . . . . . 5–3
5.4 Preventing Electrostatic Damage . . . . . . . . . . . . . . . 5–4
5.5 Packaging and Transporting Precautions . . . . . . . . . 5–5
5.6 Workstation Precautions . . . . . . . . . . . . . . . . . . . . . . 5–6
5.7 Grounding Equipment and Methods. . . . . . . . . . . . . 5–7
iv
Maintenance and Service Guide
6.22 System Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6–52
6.23 System Board Frame. . . . . . . . . . . . . . . . . . . . . . . 6–59
6.24 Push Button Module . . . . . . . . . . . . . . . . . . . . . . . 6–63
6.25 Serial Connector Module . . . . . . . . . . . . . . . . . . . 6–65
6.26 Audio Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6–67
Maintenance and Service Guide
v
Contents
7 Specifications
C Screw Listing
D Display Component Recycling
Index
vi
Maintenance and Service Guide
Product Description
1.1 Features
■
Intel Pentium M 2.13-, 2.00-, 1.86-, 1.73-, or 1.60-GHz
processors, varying by computer model
■
The following displays are available, varying by
computer model:
❏ 15.4-inch, UXGA, TFT (1600 × 1200) with over
16.8 million colors
❏ 15.4-inch, WSXGA, TFT (1680 × 1050) with over
16.8 million colors
❏ 15.4-inch, WXGA, TFT (1366 × 768) with over
16.8 million colors
■
■
■
80-, 60-, or 40-GB high-capacity hard drive, varying by
computer model
256-MB DDR2 synchronous DRAM (SDRAM) at 400 and
533 MHz, expandable to 2.0 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-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 PCI IEEE 802.11a/b 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
1–2
Maintenance and Service Guide
Product Description
■
■
■
■
External 90-watt AC adapter with 3-wire power cord
8-cell Li-Ion battery pack
Stereo speakers
Volume up, volume mute, and volume down buttons
(full-featured models only)
Numerous references are made throughout this Maintenance
and Service Guide to “full-featured” and “defeatured” units. A
computer model is considered to be full-featured if it has
3 Universal Serial Bus ports and the following components:
✎
■
■
■
■
■
■
■
Volume control buttons
Quick Launch buttons
Infrared port
SD Memory Card slot
Serial port
S-Video-out port
Docking connector
A computer model is considered to be defeatured if it has only
2 Universal Serial Bus ports and none of the components listed
above.
Maintenance and Service Guide
1–3
Product Description
■
Support for the following optical drives:
❏ DVD-ROM drive
❏ DVD+RW/R and CD-RW Combo Drive
❏ DVD/CD-RW Combo Drive
Connectors:
■
❏ Infrared (full-featured models only)
❏ Audio-out (headphone)
❏ Audio-in (microphone)
❏ Universal Serial Bus (USB) v. 2.0 (3 ports on full-featured
computer models, 2 ports on defeatured computer models)
❏ Serial port (full-featured models only)
❏ Power
❏ External monitor
❏ RJ-45 (network)
❏ RJ-11 (modem)
❏ S-Video-out (full-featured models only)
❏ IEEE 1394
❏ PC Card
❏ Smart card
❏ SD Memory Card (full-featured models only)
❏ Parallel port (full-featured models only)
❏ Primary battery
❏ Travel battery
❏ Docking connector (full-featured models only)
1–4
Maintenance and Service Guide
Product Description
1.2 Resetting the Computer
follow these steps to clear the password. These steps also
clear CMOS:
1. Prepare the computer for disassembly (refer to Section 6.3,
“Preparing the Computer for Disassembly,” for more
information).
2. Remove the real-time clock (RTC) battery (refer to
Section 6.11, “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.
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
Maintenance and Service Guide
1–5
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 (selected
models only) has been turned on.
2
Power light
■ On: The computer is on.
■ Blinking: The computer is in
standby mode.
1–6
Maintenance and Service Guide
Product Description
Table 1-1
Front Components (Continued)
Item
Component
Function
3
Battery 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
reaches a critical low-battery condition,
the battery light blinks more quickly.
■ Off: If the computer is connected to
external power, the light is turned off
when all batteries in the computer are
fully charged. If the computer is not
connected to external power, the light is
turned off until the battery reaches a
low-battery condition.
4
5
6
Integrated Drive
Electronics (IDE)
drive light
On: A drive in the hard drive bay or
MultiBay II is being accessed.
Infrared port
(full-featured models
only)
Provides wireless communication between
the computer and an optional
IrDA-compliant device.
Display release latch
Opens the computer.
Maintenance and Service Guide
1–7
Product Description
The external components on the left side of the computer are
shown below and described in Table 1-2.
Left-Side Components
Table 1-2
Left-Side Components
Item Component
Function
1
Security cable slot
Attaches an optional security cable to the
computer.
Security solutions are designed to
Ä
act as deterrents. These deterrents
may not prevent a product from being
mishandled or stolen.
2
3
4
RJ-45 (network) jack
RJ-11 (modem) jack
Connects a network cable.
Connects the modem cable.
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.
S-Video-out jack
(full-featured models
only)
The extra 3 pins also enable an optional
S-Video-to-composite adapter to be used
with the computer.
1–8
Maintenance and Service Guide
Product Description
Table 1-2
Left-Side Components (Continued)
Item Component
Function
5
Vent
Enables airflow to cool internal
components.
To prevent overheating, do not
Ä
obstruct vents. Do not allow a hard
surface, such as a printer, or a soft
surface, such as pillows or thick rugs
or clothing, to block airflow.
6
7
1394 port (4 pin)
USB port
Connects an optional 4-pin 1394 device,
such as a camcorder.
Connects USB 1.1- and 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. The External MultiBay must
be connected to an external power source.
8
9
Smart card reader
Accepts smart cards.
SD Memory Card slot
Accepts Secure Digital (SD) Memory
Cards.
10
11
PC Card slot
Supports optional Type I or Type II
PC Card.
PC Card eject button
Ejects PC Cards from the PC Card slot.
Maintenance and Service Guide
1–9
Product Description
The external components on the right side of the computer are
shown below and described in Table 1-3.
Right-Side Components
Table 1-3
Right-Side Components
Item
Component
Function
1
Audio-out
(headphone) jack
Produces system sound when connected to
optional powered stereo speakers,
headphones, headset, or television audio.
2
3
Internal microphone
Records sound.
Audio-in
(microphone) jack
Connects an optional monaural
microphone.
4
USB ports (2)
(full-featured models
only)
Connect USB 1.1- and 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. The External MultiBay must
also be connected to an external power
source.
5
6
MultiBay II
Holds an optional MultiBay II device.
Connects an optional serial device.
Serial port
(full-featured models
only)
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
Table 1-4
Rear Panel Components
Item
Component
Function
1
2
Primary battery bay
Power connector
Holds the primary battery pack.
Connects an AC adapter or an optional
automobile or aircraft adapter.
3
External monitor port
Connects an optional external VGA
monitor or projector.
Maintenance and Service Guide
1–11
Product Description
Table 1-5
Standard Keyboard Components
Item
Component
Function
1
Function keys
(f3, f4, f8–f11)
Execute frequently used system functions
when pressed in combination with the fn
key.
2
3
caps lock key
Enables caps lock and turns on the caps
lock light.
fn key
Executes frequently used system
functions when pressed in combination
with a function key or the esc key.
4
5
Windows logo key
Displays the Windows Start menu.
Windows
applications key
Displays a shortcut menu for items
beneath the pointer.
6
7
Arrow keys
Moves the cursor around the screen.
Keypad keys (15)
Can be used like the keys on an external
numeric keypad.
8
num lock key
Enables numeric lock, turns on the
embedded numeric keypad, and turns
on the num lock light.
Maintenance and Service Guide
1–13
Product Description
The computer top components are shown below and described in
Table 1-6.
Top Components, Part 1
Table 1-6
Top Components, Part 1
Component Function
Item
1
Display lid switch
Initiates standby if the display is closed
while the computer is turned on.
2
Power button
When the computer is:
■ Off, press to turn on the computer.
■ On, briefly press to initiate hibernation.
■ In standby, briefly press to resume from
standby.
■ In hibernation, briefly press to restore
from hibernation.
If the system has stopped
✎
responding and Microsoft Windows
shutdown procedures cannot be
used, press and hold the power
button for at least 4 seconds to turn
off the computer.
1–14
Maintenance and Service Guide
Product Description
Table 1-6
Top Components, Part 1 (Continued)
Item
Component
Function
3
Info Center button
Enables you to view a list of commonly
used software solutions.
4
Wireless button
Wireless light
Enables and disables wireless LAN or
Bluetooth® devices (select models only).
On: A wireless LAN or Bluetooth device is
hardware enabled.
5
Presentation mode
button
Turns on Presentation mode.
6
7
8
Caps lock light
Num lock light
On: caps lock is on.
On: num lock or the numeric keypad is on.
Turns off computer sound.
Volume mute button
(full-featured models
only)
9
Volume down button
(full-featured models
only)
Decreases system sound.
Increases system sound.
10
Volume up button
(full-featured models
only)
Maintenance and Service Guide
1–15
Product Description
Table 1-7
Top Components, Part 2
Function
Item
Component
1
Pointing stick
(select models only)
Moves the pointer and selects or activates
items on the screen.
2
3
Speakers
Produce stereo sound.
Pointing stick buttons
(select models only)
Function like the buttons on an external
mouse.
4
5
TouchPad scroll zone
TouchPad buttons
Scrolls up or down.
Function like the buttons on an
external mouse.
6
TouchPad
Moves the pointer and selects or activates
items on the screen. Can be set to perform
other mouse functions, such as scrolling,
selecting, and double-clicking.
Maintenance and Service Guide
1–17
Product Description
The external components on the bottom of the computer are
shown below and described in Table 1-8.
Bottom Components
Table 1-8
Bottom Components
Item
Component
Function
1
2
Primary battery bay
Holds the primary battery pack.
Primary battery locking
latch
Secures the primary battery pack into
the battery bay. This latch must be set
to unlock to release the battery.
1–18
Maintenance and Service Guide
Product Description
Table 1-8
Bottom Components (Continued)
Item
Component
Function
3
4
Travel battery connector
Connects an optional travel battery.
Contains one memory module slot.
Memory module
compartment
5
6
Hard drive bay
Vents (5)
Holds the primary hard drive.
Enable airflow to cool internal
components.
To prevent overheating, do not
✎
obstruct vents. Do not allow a
hard surface, such as a printer,
or a soft surface, such as pillows
or thick rugs or clothing, to block
airflow.
7
8
Primary battery release
latch
Releases the primary battery pack from
the battery bay. The primary battery
locking latch must be in the unlocked
position.
Docking connector
(full-featured models only)
Connects the computer to an optional
docking device.
Maintenance and Service Guide
1–19
Product Description
1.5 Design Overview
This section presents a design overview of key parts and features
of the computer. Refer to Chapter 4, “Illustrated Parts Catalog,”
to identify replacement parts, and Chapter 6, “Removal and
Replacement Procedures,” for disassembly steps.
The system board provides the following device connections:
■
■
■
■
■
■
■
■
■
■
■
Audio
Display
Hard drive
Intel Pentium M processors
Keyboard
Memory module
Mini PCI communications devices
PC Card
Pointing stick
TouchPad
Trusted platform module (TPM) security module
ÄCAUTION: To properly ventilate the computer, allow at least a 7.6--cm
(3-inch) clearance on the left and right sides of the computer.
The computer uses an electric fan for ventilation. The fan is
controlled by a temperature sensor and is designed to be turned
on automatically when high temperature conditions exist. These
conditions are affected by high external temperatures, system
power consumption, power management/battery conservation
configurations, battery fast charging, and software applications.
Exhaust air is displaced through the ventilation grill located on
the left side of the computer.
1–20
Maintenance and Service Guide
2
Troubleshooting
WARNING: Only authorized technicians trained by HP should repair
this equipment. All troubleshooting and repair procedures are detailed
to allow only subassembly-/module-level repair. Because of the
complexity of the individual boards and subassemblies, do not attempt
to make repairs at the component level or modifications to any printed
wiring board. Improper repairs can create a safety hazard. Any
indication of component replacement or printed wiring board
modification may void any warranty or exchange allowances.
Å
2.1 Computer Setup
Computer Setup is a preinstalled, ROM-based utility that can be
used even when the operating system is not working or will not
load. If the operating system is working, the computer restarts the
operating system after you exit Computer Setup.
Pointing devices are not supported in Computer Setup; you
must use the keyboard to navigate and make selections.
✎
The menu tables later in this chapter provide an overview of
Computer Setup options.
Maintenance and Service Guide
2–1
Troubleshooting
Accessing Computer Setup
The information and settings in Computer Setup are accessed
from the File, Security, Tools, and Advanced menus.
1. Open Computer Setup by turning on or restarting the
computer. Press f10 while the F10 = Based Setup message is
displayed in the lower-left corner of the screen.
❏ To change the language, press f2.
❏ To view navigation information, press f1.
❏ To return to the Computer Setup menu, press esc.
2. Select the File, Security, Tools, or Advanced menu.
3. To exit Computer Setup, choose one of the following:
❏ To exit without saving any changes, use the arrow keys to
select File > Ignore changes and exit, and then follow
the instructions on the screen.
❏ To exit and save all the settings you have entered, use the
arrow keys to select File > Save changes and exit, and
then follow the instructions on the screen.
Your preferences are set when you exit Computer Setup and take
effect when the computer restarts.
Computer Setup Defaults
To return all settings in Computer Setup to the values that were
set at the factory:
1. Open Computer Setup by turning on or restarting the
computer. Press f10 while the F10 = Based Setup message is
displayed in the lower-left corner of the screen.
❏ To change the language, press f2.
❏ To view navigation information, press f1.
2. Use the arrow keys to select File > Restore defaults.
3. Select the Restore Defaults check box.
2–2
Maintenance and Service Guide
Troubleshooting
4. To confirm the restoration, press f10.
5. Select File > Save changes and exit, and then follow the
instructions on the screen.
When the computer restarts, the factory settings are restored, and
any identification information you have entered is saved.
Selecting from the File Menu
Table 2-1
File Menu
Select
To Do This
System Information
■ View identification information about the
computer and any battery packs in the system.
■ View specification information about the
processor, memory and cache size, video
revision, keyboard controller version, and
system ROM.
Save to floppy
Save system configuration settings to a diskette.
Restore from floppy
Restore system configuration settings from a
diskette.
Restore defaults
Replace configuration settings in Computer Setup
with factory default settings. (Identification
information is retained.)
Ignore changes and exit
Save changes and exit
Cancel changes entered during the current
session. Then exit and restart the computer.
Save changes entered during the current session.
Then exit and restart the computer. The changes
you save are in effect when the computer restarts.
Maintenance and Service Guide
2–3
Troubleshooting
Selecting from the Security Menu
Table 2-2
Security Menu
Select
To Do This
Administrator password
Enter, change, or delete an HP Administrator
password.
Power-on password
Password options
Enter, change, or delete a power-on password.
■ Enable/Disable stringent security.
■ Enable/Disable required password on restart.
DriveLock passwords
Enable/disable DriveLock; change a DriveLock
user or master password.
DriveLock Settings are accessible only
✎
when you enter Computer Setup by turning
on (not restarting) the computer.
Smart Card security
Embedded security
Enable/disable power-on support for smart cards.
This feature is supported by select Smart
Card readers only.
✎
■ Enable/Disable the embedded security chip.
■ Restore embedded security chip to factory
settings.
■ Enable/Disable power-on authentication
support.
■ Enable/Disable automatic DriveLock.
■ Reset power-on authentication credential
Embedded Security settings are accessible
✎
only if the computer is equipped with an
embedded security chip.
Device security
System IDs
■ Enable/Disable devices in the system.
■ Enable NIC for inclusion in MultiBoot.
Enter user-defined identification values.
2–4
Maintenance and Service Guide
Troubleshooting
Selecting from the Tools Menu
Table 2-3
Tools Menu
Select
To Do This
HDD Self Test options
Run a quick or comprehensive self-test on any
hard drive in the system.
Battery Information
Memory Check
View information about any battery packs in the
computer.
■ Run a self-test on memory modules in the
computer.
■ View information about memory modules
installed in the computer.
Maintenance and Service Guide
2–5
Troubleshooting
Selecting from the Advanced Menu
Table 2-4
Advanced Menu
Select
To Do This
Language (ore press f2)
Boot options
Change the Computer Setup language.
■ Enable/Disable MultiBoot, which sets a startup
sequence that can include most bootable
devices and media in the system.
■ Set the boot order.
Device options
■ Swap the functions of the fn key and left
ctrl key.
■ Enable/Disable multiple pointing devices at
startup. (To set the computer to support only a
single, usually nonstandard, pointing device at
startup, select Disable.)
■ Enable/Disable USB legacy support for a USB
keyboard, mouse, and hub. When USB legacy
support is enabled
❐ A USB keyboard, mouse, and hub work
even when a Windows operating system
is not loaded.
❐ The computer starts from a bootable hard
drive, diskette drive diskette, or CD,
CD-RW, or DVD inserted into a drive
connected by a USB connector to the
computer or to an optional docking
device.
■ Select a parallel port mode: EPP (Enhanced
Parallel Port), standard, bidirectional, or ECP
(Enhanced Capabilities Port).
■ Enable/Disable all settings in the SpeedStep
window. (When Disable is selected, the
computer runs in Battery Optimized mode.)
2–6
Maintenance and Service Guide
Troubleshooting
2.2 Troubleshooting Flowcharts
Table 2-5
Flowchart Description
2.1
“Flowchart 2.1—Initial Troubleshooting”
2.2
“Flowchart 2.2—No Power, Part 1”
2.3
“Flowchart 2.3—No Power, Part 2”
2.4
“Flowchart 2.4—No Power, Part 3”
2.5
“Flowchart 2.5—No Power, Part 4”
2.6
“Flowchart 2.6—No Video, Part 1”
2.7
“Flowchart 2.7—No Video, Part 2”
2.8
“Flowchart 2.9—No Operating System (OS) Loading”
“Flowchart 2.10—No OS Loading, Hard Drive, Part 1”
“Flowchart 2.11—No OS Loading, Hard Drive, Part 2”
“Flowchart 2.12—No OS Loading, Hard Drive, Part 3”
“Flowchart 2.13—No OS Loading, Diskette Drive”
2.9
2.10
2.11
2.12
2.13
Maintenance and Service Guide
2–7
Troubleshooting
Table 2-5
Flowchart Description
2.14
2.15
2.16
2.17
2.18
2.19
2.20
“Flowchart 2.14—No OS Loading, Optical Drive”
“Flowchart 2.15—No Audio, Part 1”
“Flowchart 2.16—No Audio, Part 2”
“Flowchart 2.17—Nonfunctioning Device”
“Flowchart 2.18—Nonfunctioning Keyboard”
“Flowchart 2.19—Nonfunctioning Pointing Device”
“Flowchart 2.20—No Network/Modem Connection”
2–8
Maintenance and Service Guide
Troubleshooting
Flowchart 2.1—Initial Troubleshooting
Begin
troubleshooting.
N
Go to
Is there
power?
“Flowchart
2.2—No Power,
Part 1.”
Y
N
N
N
N
Check
LED board,
speaker
Beeps,
LEDs, or error
messages?
connections.
Go to
All drives
working?
Y
Y
Y
Y
“Flowchart
2.17—Nonfunc-
tioning Device.”
Y
Y
Y
Go to
“Flowchart
2.6—No Video,
Part 1.”
Is there video?
(no boot)
Go to
“Flowchart
2.18—Nonfunc-
tioning Keyboard”
or “Flowchart
2.19—Nonfunc-
tioning Pointing
Device.”
Keyboard/
pointing
device work-
ing?
Go to
“Flowchart
2.9—NoOperating
System (OS)
Loading.”
Is the OS
loading?
Go to
“Flowchart
2.20—No
Network/Modem
Connection.”
Connecting
to network
or modem?
Go to
“Flowchart
2.15—No Audio,
Part 1.”
Is there
sound?
End
Maintenance and Service Guide
2–9
Troubleshooting
Flowchart 2.2—No Power, Part 1
No power
(power LED
is off).
Remove from
docking device
(if applicable).
N
N
N
Go to
“Flowchart
2.3—No Power,
Part 2.”
Power up
on battery
power?
Power up
on battery
power?
Reset
power.*
Y
Y
N
Y
Y
N
Y
Go to
“Flowchart
2.4—No Power,
Part 3.”
Power up
on AC
Power up
on AC power?
Reset
power.*
power?
Power up in
docking
device?
Done
*NOTES
1. On select models, there is a separate reset
button.
2. On select models, the computer can be reset
using the standby switch and either the lid
switch or the main power switch.
1. Reset the power cables in the docking device
and at the AC outlet.
2. Ensure the AC power source is active.
3. Ensure that the power strip is working.
Y
N
Go to
Power up
in docking
device?
“Flowchart
Done
2.8—Nonfunction-
ing Docking Device
(if applicable).”
2–10
Maintenance and Service Guide
Troubleshooting
Flowchart 2.3—No Power, Part 2
Continued from
“Flowchart
2.2—No Power,
Part 1.”
Visually check for
debris in battery
socket and clean
if necessary.
Y
Power on?
Done
N
Check battery by
recharging it,
moving it to
another computer,
or replacing it.
N
Replace
power supply
(if applicable).
Power on?
Y
N
Go to
“Flowchart
2.4—No Power,
Part 3.”
Done
Power on?
Y
Done
Maintenance and Service Guide
2–11
Troubleshooting
Flowchart 2.4—No Power, Part 3
Continued from
“Flowchart
2.3—No Power,
Part 2.”
Plug directly
into AC outlet.
Y
Power LED
Done
on?
N
Reseat AC adapter
in computer and
at power source.
Y
Power on?
Done
N
Y
External
Internal or
external AC
adapter?
N
Y
Replace external
AC adapter.
Try different
outlet.
Power outlet
active?
Internal
N
Y
Go to
“Flowchart
2.5—No Power,
Part 4.”
Power on?
Done
Replace
power cord.
Power on?
Done
N
2–12
Maintenance and Service Guide
Troubleshooting
Flowchart 2.5—No Power, Part 4
Continued from
“Flowchart
2.4—No Power,
Part 3.”
Open
computer.
Y
Reseat loose
Loose or
damaged
parts?
components and
boards and
replace damaged
items.
N
Close
computer and
retest.
N
Replace the following items (if applicable). Check
computer operation after each replacement:
1. Internal DC-DC converter*
2. Internal AC adapter
Power on?
Y
3. Processor board*
4. System board*
*NOTE: Replace these items as a set to prevent
shorting out among components.
Done
Maintenance and Service Guide
2–13
Troubleshooting
Flowchart 2.6—No Video, Part 1
No video.
Docking Device
Go to
*NOTE: To change from internal to
external display, use the hotkey combi-
nation.
Stand-alone
or docking
device?
“Flowchart
2.7—No Video,
Part 2.”
Stand-alone
Y
Internal or
external
display*?
Adjust
brightness.
Video OK?
Done
N
Internal
External
Press lid
switch to ensure
operation.
A
Adjust
brightness.
Y
Y
Video OK?
Done
Video OK?
Done
N
N
Replace the following one at a time. Test after each replacement.
1. Cable between computer and computer display (if applicable)
Check for bent
pins on cable.
2. Display
3. System board
N
N
Replace
system
board.
Try
another
display.
Internal and
external
Video OK?
Done
video OK?
Y
Y
Done
2–14
Maintenance and Service Guide
Troubleshooting
Flowchart 2.7—No Video, Part 2
Continued from
“Flowchart
2.6—No Video,
Part 1.”
Remove
computer from dock-
ing device,
if connected.
Adjust
display
brightness.
of external
monitor.
N
Y
Go to “A” in
“Flowchart
2.6—No Video,
Part 1.”
Video OK?
Video OK?
Done
Y
N
Check that computer is properly
seated in docking device, for
bent pins on cable, and for
monitor connection.
Try another
external
monitor.
Y
Y
Internal
and external
video OK?
Video OK?
Done
N
N
Go to
“Flowchart
2.8—Nonfunction-
ing Docking Device
(if applicable).”
Adjust external
monitor display.
Maintenance and Service Guide
2–15
Troubleshooting
Flowchart 2.8—Nonfunctioning Docking Device
(if applicable)
Nonfunctioning
docking device.
Reset power cord in
docking device and
power outlet.
Check voltage
setting on docking
device.
Reinstall
computer into dock-
ing device.
Y
Reset monitor
cable connector at
docking device.
Docking
device
operating?
Done
N
Y
Docking
device
Done
Replace the following docking device compo-
nents one at a time. Check computer opera-
tion after each replacement.
1. Power supply
operating?
N
2. I/O board
3. Backplane board
4. Switch box
5. Docking device motor mechanism
Remove
computer, reset
all internal parts,
and replace any
damaged items in
docking device.
2–16
Maintenance and Service Guide
Troubleshooting
Flowchart 2.9—No Operating System (OS)
Loading
No OS
loading.*
Reset power
cord in docking
device and
power outlet.
No OS loading from hard drive,
go to “Flowchart 2.10—No OS Loading,
Hard Drive, Part 1.”
No OS loading from diskette drive,
go to “Flowchart 2.13—No OS Loading, Dis-
kette Drive.”
No OS loading from CD-ROM or DVD-ROM
drive, go to “Flowchart 2.14—No OS Load-
ing, Optical Drive.”
No OS loading from network,
go to “Flowchart 2.20—No Network/Modem
Connection.”
*NOTE: Before beginning troubleshooting, always
check cable connections, cable ends, and drives
for bent or damaged pins.
Maintenance and Service Guide
2–17
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