Asus MW221 - Power;Inverter Board Troubleshooting

22" LCD Color Monitor ASUS MW221
36
8.2.2 Power/Inverter Board
1.) No power
Check bridge rectified circuit and F901 circuit
Check R927, R928, R929 and Change IC902
1) Check IC902
2) Check IC902 over current protect circuit
Check CN903 pin2, 4 = 12V
Check AC line volt 110V or 220V
Check AC input
Check the voltage of C912 (+)
Check start voltage for the pin8 of IC902
NG
Check the auxiliary voltage is bigger than
10V and smaller than 20V
OK
OK
NG
Check Q902, D907, D952, PC951 and T901
OK
Check IC902 pin5 PWM wave
OK
Check IC902
NG
NG
NG
OK
NG
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