19" LCD Color Monitor HP L1940T
21
8.2 Power Board
1. No Power
Check AC line volt 110V or 220V
OK
Check AC line
Check the voltage of C907(+)
Check F901, bridge rectified circuit
Check start voltage for the pin8 of IC901
Check R907, IC901
Check the auxiliary voltage is between 10V-17V
Check IC901,T901, D905,D926 OVP
OK
Check Q901, D901, FB Circuit
OK
NG
No power
NG
NG
OK
NG