AOC 212Va - Troubleshooting Guides; Main Board Troubleshooting

22" LCD Color Monitor AOC 212Va
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8.2 Trouble Shooting
8.2.1 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
Reinsert or check the
Adapter/Inverter
section
X401 oscillate waveforms
are normal
Check CN701 or replace
U702，Q702 or D701
Replace U401
Replace X401
OK
OK
OK
NG
NG
NG
NG
Measure U702 PIN2=3.3V
D701 (-) =1.8V