Symptom

Battery does not charge

Second battery does not work, main battery works

Battery indicator is inaccurate

Display

Dark display, no light

White display

Erratic display

Bright or missing pixels or lines

For a 13-inch LCD, noise or discoloration when the display is moved

Call Center:

Suggestions

Check the power source.

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

Check for high ambient temperature and blocked air vents.

Try swapping the two batteries.

Check contacts on second battery.

Second battery does not charge until main battery is fully charged.

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

For an OmniBook 4150B, shut down and restart. During boot at the F2 prompt, press F6. This starts a process that recalibrates the battery gauge, possibly inproving operating time. When the discharge cycle ends, you may have to unplug and reconnect the ac adapter to begin recharging.

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

Adjust display brightness.

See quality statement on page 5-2.

Repair Center: Likely Causes

Battery or contacts. AC adapter. Motherboard.

Fan.

DC-DC PCA.

Second battery or contacts.

Motherboard.

Motherboard.

LCD module (backlight).

LCD cable or connections.

Inverter PCA.

LVDS PCA.

LCD module.

Inverter PCA.

LVDS PCA.

LCD cable or connections.

LCD module.

LCD module.

LCD cable or connections.

LCD cable connection.

Repair Center:

Comments

Check ac adapter.

Check fan.

Try cycling the battery charge.

Reseat the VGA PCA.

If an external monitor displays no image, replace the VGA PCA instead, then motherboard.

See quality statement on page 5-2.

Remove the LCD shield and check the flex cable connection at the back of the 13-inch LCD module. Two rubber spacers should be behind the connector. After the shield is installed, it should be taped to the flex cable. See the caution on page 2-16. (Service notes 4100-04, 4100-05.)

HP OmniBook 4100/4150

Troubleshooting and Diagnostics

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