Dell E153FPc Service Manual page 39

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9.2.2 Inverter/Power Board
No Power
Check to CN102 Pin12=12V
Check AC line volt 110V or 220V
Check the voltage of C904(+)
Check start voltage for the pin3 of IC901
Check the auxiliary voltage Is between 10V-16V
Check D910, D911, ZD904
NG
OK
NG
OK
NG
OK
NG
OK
NG
OK
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Check Interface board
Check AC line
Check F901, bridge rectified circuit
Check R906, R907, IC901
1) Check IC902, IC903
2) Check Q901, Q902 OVP circuit
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Dell E153FPc