HP OMNIBOOK 4100 Service Manual page 71

Symptom Call Center:
Suggestions
Computer pauses May be normal Windows
or runs sluggishly behavior (background
processing can affect
response time).
If the hard disk has spun
down to conserve power, it
can take several seconds to
spin up. You can hear this.
You can run BIOS Setup and
change the hard disk time-
out to match the Suspend
time-out.
Certain background
operations (such as HP COE
virus scans) can affect
performance while they're
running.
Some file browsers may be
unresponsive while they're
processing a graphic image
or waiting for broken network
connections to time out.
Check for overheating—see
the previous symptom.
Run BIOS Setup and try
turning off smart CPU mode.
Accessories
Docking product I/O Check that ac power is
problems connected.
Check settings in BIOS
Setup.
Try using the corresponding
OmniBook port.
Can not boot from Check that the CD is
CD in CD-ROM bootable.
drive
During boot, do not press
ESC before the F2 prompt—
or check boot order in BIOS
Setup.
General plug-in Check module contacts.
module problems
Push system-off button.
† Models called 4150† in this manual have no marking in the serial number, whereas models called 4150B
have 4150 B after the serial number.
3-12 Troubleshooting and Diagnostics
Repair Center: Repair Center:
Likely Causes Comments
CPU module. If computer slows after a
period of continuous activity,
Motherboard.
check thermal connections
and parts—see the previous
symptom.
Docking product. Test the corresponding
OmniBook ports while
Motherboard.
undocked.
The port replicator and mini
dock are not repairable—they
must be exchanged.
The docking system is
repairable—see its service
manual.
For an F1629A OmniBook
4150† with certain serial
numbers between
TW84257202 and
TW84358133, check the
CPU module to see if it must
be replaced—see Service
note 4150-01.
CD-ROM drive. The CD-ROM drive is not
repairable—it must be
exchanged.
Plug-in module or Plug-in modules are not
contacts. repairable—they must be
exchanged.
Motherboard.
HP OmniBook 4100/4150