If you can’t isolate the cause of a problem using the diagnostic tools, you can use the suggestions in the following table to help find the problem.

Table 3-2. Troubleshooting Suggestions

 

Symptom

 

Call Center:

 

Repair Center:

 

Repair Center:

 

 

 

 

Suggestions

 

Likely Causes

 

Comments

 

 

 

 

 

 

 

 

 

 

To help determine likely causes, check to see what replaceable modules are involved in the system function and what roles they play. See the table on page 1-13.

Startup

Does not boot on ac or battery

Does not boot on battery (boots on ac)

Does not boot from floppy drive

Error message such as “Invalid system disk” or “Auto IDE error”

Sluggish startup or shutdown

Check the power source. Push system-off button.

Unplug the ac adapter and remove all batteries, then reconnect power.

Remove any RAM boards and try again. Reinsert and try again.

Check battery level on status panel and battery LEDs.

Check battery contacts. If available, try another battery.

Check floppy drive contacts.

Check boot order in BIOS Setup.

Check that floppy boot is enabled in BIOS Setup.

Check for a disk in floppy drive.

Remove and reinsert hard drive.

Check boot order in BIOS Setup.

Run ScanDisk and Disk Defragmenter to check and optimize the hard drive.

Delete temporary and unneeded files.

AC adapter.

DC-DC PCA.

RAM board.

CPU module.

Motherboard.

Video PCA.

LCD module.

Hard drive.

Battery or contacts. DC-DC PCA. Motherboard.

Floppy drive or contacts.

Motherboard.

Hard drive contacts. Hard drive.

Check ac adapter. Remove any RAM boards and retry.

If status panel does not turn on, reprogram BIOS, replace DC-DC PCA, replace motherboard.

If status panel turns on but display remains off, try external monitor. If monitor shows successful boot, replace LCD module. If monitor shows activity but BIOS does not complete, replace CPU module. If monitor is blank, replace video PCA, replace CPU module, replace motherboard.

If status panel and display turn on, BIOS completes, but OS does not start from hard disk or from floppy drive, replace CPU module, then motherboard. If OS starts from floppy drive, reload hard drive, replace hard drive.

If unit boots from floppy drive, check for corrupt files on hard drive, reload hard drive, replace hard drive.

Use same suggestions shown at left.

HP OmniBook 7100

Troubleshooting and Diagnostics

3-5