Acer AT1945 Service Manual page 35

W / LED, No Backlight
Check IC801 PIN 15 have the output of square wave at short time
Check the input of Q80 5, Q806
Check the output of PT801, PT802
Check connecter & lamp
Check R803=12V
OK
Check ON/OFF
OK
Check IC801
OK
OK
NG
OK
NG
OK
NG
Check adapter or MB
NG
Check Interface board
NG
Change
NG
Change IC801
Change Q805, Q806,D801,D802,D803,Q804
Change PT801, PT802
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