AOC e940Swa - 9.2.2 Power Board Troubleshooting

18.5" LCD Color Monitor AOC e940Swa
41
9.2.2 Power Board
1. No Power
Check AC line volt 110V or 240V
Check AC input
Check the voltage of C907 (+)
Check bridge rectified circuit and F901 circuit
Check start voltage for the pin8 of IC901
Check R906, R934 Change IC901
NG
Check the auxiliary voltage is bigger than
10V and smaller than 20V
1) Check IC901
2) Check OVP circuit
OK
OK
NG
Check Q901//IC902/IC903/D902/D903/D906/D908/LED1
OK
Check IC901 pin5,6 PWM wave
OK
Check IC901
NG
NG
OK
NG