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Trouble Shooting; Main Board - Asus MM19S Service Manual

19” lcd monitor
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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 U201 PIN2=1.8V
U202 PIN2=3.3V
OK
X601 and X401 oscillate
waveforms are normal
OK
Replace U601
NG
Replace U401
NG
NG
NG
Replace X601, X401
34
Reinsert or check the
Adapter/Inverter
section
Check CN201 or replace
U201, U202
ASUS MM19S

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