Dell 1707FPc - No Power

Dell 1707FPc
56
9.2.2 Inverter/Power Board
No Power
Check AC line volt 110V or 220V
OK
Check AC line
Check the voltage of C903(+)
Check F901, bridge rectified circuit
Check start voltage for the pin3 of IC901
Check R903, R04, R905
IC921,IC902
Check the auxiliary voltage is between 10V-17V
Check T901, D901
OK
Check D920, D921, ZD920 Circuit
OK
NG
No power
NG
NG
OK
NG