Symptom

Display

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Suggestions

Likely Causes

Repair Center: Comments

Dark display, no light.

White display.

Erratic display.

Bright or missing pixels or lines.

Punctured display.

Make sure notebook is turned on and warmed up.

Check power supply. Adjust display brightness. Press Fn+F5 several times.

Make sure SDRAM modules are installed properly.

Make sure display cables are properly connected.

Make sure CPU module is installed properly.

Try external monitor.

Adjust display brightness.

See quality statement on page 5-2.

Display cable connection.

SDRAM modules. CPU module. Display assembly. Motherboard.

Display assembly.

Display cable connection.

Display assembly. Motherboard.

Display cable connection.

Display assembly.

Check cable connections. Replace SDRAM modules. Replace CPU module.

Replace display assembly.

If external monitor displays no image, replace motherboard.

Check display cable connection.

Check display cable connection.

See quality statement on page 5-2.

Declared to be caused by customer abuse.

Vertical crack near center of display.

Scratched display glass.

Local area of dark or light discoloration visible when display is on.

External display does not work.

Display difficult to read or part of desktop not visible.

Cannot switch to TV display by pressing Fn+F5

Check connections.

Press Fn+F5 several times.

Try display on another computer.

Check display resolution (default is 1024 × 768).

Use HP Desktop Zoom to adjust size of desktop icons and labels.

Fn+F5 switches only between internal LCD and external display connected to VGA port, and will not switch to TV display connected to TV output port.

Usually caused by closing display with pencil-sized object on keyboard.

Caused by excessive pressure applied to area on screen.

External display. Motherboard.

Declared to be caused by customer abuse.

Declared to be caused by customer abuse.

Declared to be caused by customer abuse.

HP Pavilion zt1100/xz100 Omnibook xt1000

Troubleshooting and Diagnostics

3-9

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HP ZT1100 manual Dark display, no light White display Erratic display