20” LCD Color Monitor BenQ G2020HDA
52
W / LED, No Backlight
Check Inverter input =12V
NG
OK
Check adapter and F801
Check ON/OFF signal
Check Interface board or main board
NG
OK
Check IC801 PIN 11=5V
NG
OK
Change ON/OFF circuit
Check IC801 PIN8/PIN9 PWM wave
NG
OK
Check IC801
Check Q805, Q806 Drain wave
NG
Check the output of T801
Change Q805, Q808
Check connecter & lamp, feedback and protect circuit
OK
NG
Change T801
OK
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