Dell SP2009W Service Manual - Page 50
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20" LCD Color Monitor 9.2 Trouble shooting 9.2.1 Main Board No power Dell SP2009Wc No power Press power key and look if the picture is normal OK Please reinsert and make sure the AC of 100-240 is normal OK NG Measure U701 PIN2=3V U702 PIN2=2V NG OK X401，X402 oscillate waveforms are normal NG OK Check U401，U402 Reinsert or check the Adapter/Inverter section Check CN701 or replace U701, U702 Replace X401，X402 50
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20" LCD Color Monitor
Dell SP2009Wc
50
9.2 Trouble shooting
9.2.1 Main Board
No power
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
U702 PIN2=2V
Reinsert or check the
Adapter/Inverter
section
X401
，
X402 oscillate
waveforms are normal
Check CN701 or replace
U701, U702
Check U401
，
U402
Replace X401
，
X402
OK
OK
OK
NG
OK
NG
NG