Trouble Shooting; Main Board - AOC LM560s Service Manual

15" LCD Color Monitor

9.2 Trouble Shooting

9.2.1 Main Board

No Power
Please reinsert and make sure
the AC of 100-240 is normal
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No power
Press power key and look
if the picture is normal
NG
OK
Measure U201 PIN2=2.5V
U202 PIN2=3.3V
OK
X601 and X401 oscillate
waveforms are normal
OK
Replace U601
NG
Replace U401
Reinsert or check the
NG
Adapter/Inverter
section
NG
Check CN201 or replace
U201, U202
NG
Replace X601, X401
30
AOC LM560s