HP w1707 - Selecting Video Input Connectors; Adjusting Screen Quality

17" LCD Color Monitor HP W1707
33
9.2.2 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 pin8of IC901
Check R904, R932, R933,IC901
Check the auxiliary voltage is bigger than 10V and smaller than 20V
Check IC901 pin8 PWM wave
OK
OK
No power
NG
NG
NG
Check IC901,D901,C908
NG
Check IC901
Check T901,D907,D905,D906,Q903,IC902,IC903
OK
OK
NG