Acer AL2051 Service Manual page 37

2. Power Board
No power
Check AC line volt 110V or 220V
Check the voltage of C904(+)
Check start voltage for the pin3 of IC901
Check the auxiliary voltage is between 10V-16V
Check D904, D905,IC902
No power
NG
OK
NG
OK
OK NG
OK
NG
Check AC line
Check F901, bridge rectified circuit
Check R903, R904,IC901
Check Q902,Q903
Check T901, D902
37