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3-12 Troubleshooting and Diagnostics HP OmniBook 4100/4150
Symptom Call Center:
Suggestions
Repair Center:
Likely Causes
Repair Center:
Comments
Computer pauses
or runs sluggishly
May be normal Windows
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.
CPU module.
Motherboard.
If computer slows after a
period of continuous activity,
check thermal connections
and parts—see the previous
symptom.
Accessories
Docking product I/O
problems
Check that ac power is
connected.
Check settings in BIOS
Setup.
Try using the corresponding
OmniBook port.
Docking product.
Motherboard.
Test the corresponding
OmniBook ports while
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.
Can not boot from
CD in CD-ROM
drive
Check that the CD is
bootable.
During boot, do not press
ESC before the F2 prompt—
or check boot order in BIOS
Setup.
CD-ROM drive. The CD-ROM drive is not
repairable—it must be
exchanged.
General plug-in
module problems
Check module contacts.
Push system-off button.
Plug-in module or
contacts.
Motherboard.
Plug-in modules are not
repairable—they must be
exchanged.
† Models called 4150† in this manual have no marking in the serial number, whereas models called 4150B
have 4150 B after the serial number.