AOC e940Swa - 9.2 Trouble Shooting; 9.2.1 Main Board Troubleshooting

18.5" LCD Color Monitor AOC e940Swa
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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 U702 Vout=3.3V,
U704 Vout=1.8V
Reinsert or check the
power section
X401 oscillate waveforms are
normal
Check U702, U704,
CN702
Replace U401
Replace X401
OK
OK
OK
NG
NG
NG
NG
No power