AOC 2036Sa Service Manual page 40

8.2.2 Power/Inverter Board
1.) No power
Check ZD901 =14.5V
Check AC line volt 100V or 240V
Check the voltage of C907 (+)
Check start voltage for the pin8 of U901
Check the auxiliary voltage
Check U901 pin5 PWM wave
Check Q901, Q904, U902, U903
NG
NG
OK
OK
NG
OK
OK
OK
Check AC input
NG
Check bridge rectified circuit and F901 circuit
Check R908, U901
NG
1) Check U901, T901
2) Check D902, D905, D906
NG
Change U901
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