Trouble Shooting - AOC 2230FH Service Manual

22" LCD Color Monitor

8.2 Trouble Shooting

8.2.1 Main Board
No Power
No power
Press power key and look
if the picture is normal
NG
Please reinsert and make sure
the AC of 100-240 is normal
OK
Measure U103 PIN2=3.3V
U104 PIN2=1.8V
OK
Measure X401 oscillate
waveforms are normal
OK
Replace U401
NG
Reinsert or check the
Adapter/Inverter section
NG
Check CN101 or replace
U103, U104
NG
Replace X401
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AOC 2230FH