AOC HP L1906 Service Manual page 36

19" LCD Color Monitor
9.2.2 Power Board
1. No Power
OK
Check D920 D921 ZD920...
No power
Check AC line volt 110V or 220V
NG
OK
Check the voltage of C905(+)
NG
OK
Check start voltage for the pin3 of IC901
NG
OK
Check the auxiliary voltage is between 10V-16V
Repeating the start voltage
OK
Check D902, D904, IC902
NG
Check AC line
Check F901, bridge rectified circuit
Check R909, R910,IC931
NG
Check IC901,T901
Check D906, IC904
Check IC902,IC903
Check Q910...OLP circuit
36
HP L1906