Trouble Shooting - HP LP2275w Service Manual

22" LCD Color Monitor

9.2 Trouble Shooting

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&U707 PIN2=3.3V
U702=2.5V U708 PIN5,6=1.8V
X401 oscillate waveforms
are normal
No power
OK
OK
NG
OK
NG
OK
Check U401
NG
Replace U401
Reinsert or check the
NG
Adapter/Inverter
section
Check CN701 or replace
U701,U707, U702 U708
Replace X401
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HP LP2275w