Dell 1907FPc Service Manual page 57

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9.2.2 Inverter/Power Board
No Power
Check AC line volt 110V or 220V
Check the voltage of C903(+)
Check start voltage for the pin3 of IC901
Check the auxiliary voltage is between 10V-17V
Check D920, D921, ZD920 Circuit
No power
NG
OK
OK NG
NG
OK
NG
OK
u5[Pb€ g /• D e™ • Q
Check AC line
Check F901, bridge rectified circuit
Check R903, R04, R905
IC921,IC902
Check T901, D901
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Dell 1907FPc