Acer AT1945 Service Manual page 34

Power (No LED indicator)
Check CN902pin10,11 =12 V
Check the voltage of C905 (+)
Check start voltage for the pin8 of IC901
Check bridge rectified circuit and F901 circuit
Check R904, R905 and Change IC901
1) Check IC901.D902.C908
2) Check IC902 OVP circuit
Check IC901 pin5 PWM m
Check T901, Q903, D906, D904, D912, ZD920, ZD902, IC903
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