AOC 912Sw - Troubleshooting Guides; Main Board Troubleshooting

19" LCD Color Monitor AOC 912Sw
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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 U702 Vout=3.3V
Q702 Vc=1.8V
Reinsert or check the
Adapter/Inverter
section
X401 oscillate waveforms
are normal
Check CN701 or replace
U702, Q702
Replace U401
Replace X401
OK
OK
OK
NG
NG
NG
NG