Trouble Shooting - AOC 2212ph Service Manual

22" LCD Color Monitor

8.2 Trouble Shooting

8.2.1 Main Board
(1). 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 U705 PIN2=1.8V
U704 PIN2=2.5V U707/U706 PIN2 3.3V
X401 oscillate waveforms are normal
No power
NG
OK
OK
X402 oscillate waveforms
are normal
OK
Check U402
OK
OK
Change U401
Reinsert or check the
NG
Adapter/Inverter
section
NG
Check CN701 or replace
U705 U704 U706 or,U707
NG
Replace X402
NG
Replace U402
NG
Replace X401
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AOC 2212ph