Symptom

Display

Dark display, no light.

White display.

Erratic display.

Bright or missing pixels or lines.

Punctured display.

Vertical crack near center of display.

Scratched display glass.

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

Call Center:

Repair Center:

Repair Center:

Suggestions

Likely Causes

Comments

 

 

 

Make sure notebook is

Display cable

Check cable connections.

turned on and warmed up.

connection.

Replace SDRAM modules.

Check power supply.

SDRAM modules.

Replace CPU module.

Adjust display brightness.

CPU module.

Replace display assembly.

Press Fn+F5 several times.

Display assembly.

If external monitor displays

Make sure SDRAM modules

Motherboard.

no image, replace

are installed properly.

 

motherboard.

Make sure display cables are

 

 

properly connected.

 

 

Make sure CPU module is

 

 

installed properly.

 

 

Try external monitor.

 

 

Adjust display brightness.

Display assembly.

 

 

Display cable

Check display cable

 

connection.

connection.

 

Display assembly.

 

 

Motherboard.

 

See quality statement on

Display cable

Check display cable

page 5-2.

connection.

connection.

 

Display assembly.

See quality statement on

 

 

page 5-2.

 

 

Declared to be caused by

 

 

customer abuse.

 

Usually caused by

Declared to be caused by

 

closing display with

customer abuse.

 

pencil-sized object

 

 

on keyboard.

 

 

 

Declared to be caused by

 

 

customer abuse.

 

Caused by excessive

Declared to be caused by

 

pressure applied to

customer abuse.

 

area on screen.

 

 

 

 

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.

External display. Motherboard.

Technology Code IC)

Troubleshooting and Diagnostics

3-9