HP Book 900 manual Power/Battery, Call Center Suggestions, Repair Center Likely Causes

Symptom

Sluggish startup or shutdown

Password has been forgotten

Power/Battery

Short battery operating time

Does not run on battery, empty battery indication

Battery does not charge

Battery indicator is inaccurate

Display

Dark display, no light

Call Center:

Suggestions

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

Delete temporary and unneeded files.

Verify proper ownership, then follow the removal procedure with the owner and log the appropriate data—see page 5-1.

Turn down display brightness.

Check power management settings in BIOS Setup. Try the default settings.

Shut down and restart. During boot at the F2 prompt, press F6. This starts a process that recalibrates the battery gauge, possibly improving operating time.

Inform user that certain applications can cause excess power usage. (User can get power monitor from www.intel.com and monitor CPU load.)

Some PC cards (PCMCIA) draw power even while not in use.

Heavy modem use can affect battery operating time.

Check battery contacts. If available, try another battery.

Check the power source.

Check battery contacts. If available, try another battery and ac adapter.

Check for high ambient temperature and blocked air holes on the side and bottom. Do not charge in a small space or on a soft surface.

Completely charge and discharge the battery 2 to 4 cycles in the unit.

Adjust display brightness. Press Fn+F5 several times. Try external monitor.

Check for very low ambient temperature.

Repair Center:

Likely Causes

Battery.

Motherboard.

Battery or contacts. Motherboard.

Battery or contacts. AC adapter. Motherboard.

Fan.

Battery.

Motherboard.

LCD module (backlight).

LCD flex cable, power cable, or connections.

Motherboard.

Repair Center:

Comments

Use same suggestions shown at left.

The user must call Technical Support and provide proof of ownership. Password removal is restricted to certain sites. See page 5-1.

Battery capacity often decreases after a year or more.

Check ac adapter.

Check fan.

Try cycling the battery charge. Press F6 during boot to cycle the battery charge.

If an external monitor displays no image, replace the motherboard.

3-6 Troubleshooting and Diagnostics HP OmniBook 900