BenQ G920HDA Service Manual page 50

18.5" LCD Color Monitor
W / LED, No Backlight
Check Inverter input =12V
Check ON/OFF signal
Check Q805, Q806 Drain wave
Check connecter & lamp, feedback and protect circuit
NG
OK
NG
OK
Check IC801 PIN 11=5V
NG
OK
Check IC801 PIN8/PIN9 PWM wave
NG
OK
NG
OK
Check the output of T801
NG
OK
Check adapter and F801
Check Interface board or main board
Change ON/OFF circuit
Check IC801
Change Q805, Q808
Change T801
50
BenQ G920HDA