AOC 919SWA Service Manual page 33

19" LCD Color Monitor
9.2.2 Power Board
1. No Power
Check ZD902 = 16V
Check AC line volt 110V or 240V
Check the voltage of C905(+)
Check start voltage for the pin3 of IC901
Check the auxiliary voltage
Check IC901 pin8 PWM wave
Check IC903,IC904,Q901,D906,D907
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NG
NG
OK
NG
OK
NG
OK
NG
OK
NG
OK
Check AC input
Check bridge rectified circuit and F901 circuit
Check R904,R905,R906 and Change IC901
1) Check IC901,T901
2) Check OVP circuit
Check IC901
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AOC 919Swa