Dell E153FPc Service Manual page 39

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