AOC 2210S Service Manual page 33

22" LCD Color Monitor
8.2.2 Power/Inverter Board
1.) No power
Check CN903 pin2, 4 = 12V
NG
Check AC line volt 110V or 220V
OK
Check the voltage of C912 (+)
OK
Check start voltage for the pin8 of IC902
OK
Check the auxiliary voltage is bigger than
10V and smaller than 20V
OK
Check IC902 pin5 PWM wave
OK
Check Q902, D907, D952, PC951 and T901
NG
Check AC input
NG
Check bridge rectified circuit and F901 circuit
NG
Check R927, R928, R929 and Change IC902
NG 1) Check IC902
2) Check IC902 over current protect circuit
NG
Check IC902
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AOC 2210S