3-6 Troubleshooting and Diagnostics HP OmniBook 900 Symptom Call Center: Repair Center: Repair Center: Suggestions Likely Causes Comments Sluggish startup or shutdown Run ScanDisk and Disk Defragmenter to check and optimize the hard drive. Delete temporary and unneeded files. Use same suggestions shown at left. Password has been forgotten Verify proper ownership, then follow the removal procedure with the owner and log the appropriate data—see page 5-1. The user must call Technical Support and provide proof of ownership. Password removal is restricted to certain sites. See page 5-1. Power/Battery Short battery operating time 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. Battery. Motherboard. Battery capacity often decreases after a year or more. Does not run on battery, empty battery indication Check battery contacts. If available, try another battery. Battery or contacts. Motherboard.
Battery does not charge 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. Battery or contacts. AC adapter. Motherboard. Fan. Check ac adapter. Check fan. Battery indicator is inaccurate Completely charge and discharge the battery 2 to 4 cycles in the unit. Battery. Motherboard. Try cycling the battery charge. Press F6 during boot to cycle the battery charge. Display Dark display, no light Adjust display brightness. Press Fn+F5 several times. Try external monitor. Check for very low ambient temperature.
LCD module (backlight). LCD flex cable, power cable, or connections. Motherboard. If an external monitor displays no image, replace the motherboard.