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Is backlight lit?
Refer "Checking the backlight unit" section"
OK
NG
Does computer output RGB video signals?
OK
Check OSM menu is display on screen
when you push the "MENU" key.
Proceed "Abnormal sreen" dection"
OK
NG
Check the video cable for failure. Check the host for output signal is all
black or not.
1) Change pattern of video signal output on the host.
2) Reconnect the video cable.
3) Change the video cable.
NG
Check if the LCD video signal cable is connected between the Interface
Board and LCD module.
OK
Next Page
NG
Failure Point
The LCD video signal cable is disconnected.
5.2 Nothing display on screen (screen is black, color of LED is blue)
Go to cover page
24
5. Troubleshooting (continued)
ACER H233H