HP Omnibook XE4400 Service Manual page 79

Symptom Call Center:
Suggestions
Wireless
General problems. Check TCP/IP setup in
Control Panel.
Check SSID, channel, and
encryption settings.
One-Touch button
problems
Buttons not working Make sure correct
properly. applications are associated
with buttons in One-Touch
tab of Keyboard in Control
Panel.
On-screen display Make sure Onscreen Display
does not appear is enabled in One-Touch tab
when button is of Keyboard in Control Panel.
pressed.
PCMCIA
General problems. Restart notebook.
Try card in another computer.
If card requires an IRQ, make
sure one is available.
In Device Manager, refresh
device list and check for
conflicts.
Download current drivers
from card manufacturer's
web site.
AC adapter
Does not power Make sure AC adapter has
notebook. correct power rating.
Try another AC adapter, if
available.
Motherboard
Evidence of spilled
liquid.
Bent or broken
connectors, or burnt
component.
Motherboard
cracked.
Miscellaneous
Clock loses time Plug in AC adapter for 24
hours to charge CMOS
battery.
Notebook gets Always set notebook on a flat
abnormally hot. surface, so air can flow freely
around and underneath it
Make sure air vents are not
blocked.
Games and other programs
that drive CPU usage toward
100% can contribute.
HP Omnibook XE4400
Repair Center: Repair Center:
Likely Causes Comments
Mini-PCI card. Make sure all cables are
properly connected to mini-
Antenna PCAs.
PCI card and motherboard.
Motherboard.
Check for damaged coaxial
cables or connectors.
Keyboard
cover/speaker
assembly.
Button cover.
Motherboard.
PCMCIA socket. Using a flashlight, look for
bent pins inside the PCMCIA
Motherboard.
socket.
If only one slot is affected,
replace PCMCIA socket. If
both slots are affected,
replace motherboard.
AC adapter. AC adapter cannot be
repaired and must be
Motherboard.
replaced.
Declared to be caused by
customer abuse.
Declared to be caused by
customer abuse.
Declared to be caused by
customer abuse.
CMOS battery. Charge CMOS battery.
Motherboard.
Heatsink. Check heatsink for damage
or proper fan operation.
Check thermal contact
between CPU and heatsink.
Replace thermal pad if
needed.
Troubleshooting and Diagnostics 3-15