Trouble Shooting - Dell SP2309Wc Service Manual

23" LCD Color Monitor

9.2 Trouble shooting

9.2.1 Main Board
No power
Press power key and look
if the picture is normal
Please reinsert and make sure
the AC of 100-240 is normal
Measure U701 PIN2=3V
U711 PIN2=1V
X401 oscillate waveforms
are normal
No power
OK
OK
NG
OK
NG
OK
Check U401
Reinsert or check the
NG
Adapter/Inverter
section
Check CN701 or replace
U701, U711
Replace X401
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Dell SP2309Wc