Symptom

Call Center:

Repair Center:

Repair Center:

 

Suggestions

Likely Causes

Comments

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.

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

Can not boot from CD in CD-ROM drive

Check that ac power is connected.

Check settings in BIOS Setup.

Try using the corresponding OmniBook port.

Check that the CD is bootable.

During boot, do not press ESC before the F2 prompt— or check boot order in BIOS Setup.

Docking product. Motherboard.

CD-ROM drive.

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.

The CD-ROM drive is not repairable—it must be exchanged.

General plug-in

Check module contacts.

Plug-in module or

module problems

Push system-off button.

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.

3-12 Troubleshooting and Diagnostics

HP OmniBook 4100/4150