Service manual

17" LCD Color Monitor AOC 177Vk
39
2.) W / LED, No Backlight
Check CN902 pin3,4 = 12V
NG
OK
Check adapter or MB
Check ON/OFF signal
Check Interface board
NG
OK
Check IC801 pin2=12V
NG
OK
Change Q802 or Q803
NG
OK
Check IC801 PIN5/6
NG
OK
Check Q805, Q806
Check the output of PT801, PT802
Check connecter & lamp
OK
NG
Check PT801, PT802
Check Q805, Q806 PIN5, 8= 12V
Check IC801 PIN1/15 have the output of square wave at short