Acer A221HQV - Page 36

5. Troubleshooting (continued)
5.2.2 Nothing displays on the screen (Screen is black and colour of LED is blue):
Refer "Checking the backlight unit" section"
OK
NG
OK
Proceed "Abnormal sreen" section"
OK
NG
Check the video cable for failure. Check the host for output
signal with all black only.
1) Change pattern of video signal output on the host.
2) Reconnect the video cable.
3) Change the video cable. (VGA or DVI)
NG
OK
Next Page
NG
Failure Point
The LVDS cable is disconnected.
Is backlight light up?
Does computer output
RGB video signals? (VGA or DVI)
Check OSD menu is
display on screen when you push
the "MENU" key.
Check if the LCD module
signal cable is connected between
the Interface Board and LCD
module.
34
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ACER A211H/A221HQ