Trouble Shooting - Asus VB191T Service Manual

19" LCD Color Monitor

8.2 Trouble Shooting

8.2.1 Main Board
(1). No Power
Please reinsert and make sure
the AC of 100-240 is normal
No power
Press power key and look
if the picture is normal
NG
OK
Measure U701 PIN2=3.3V
Measure U702 PIN2=1.8V
OK
X401 oscillate waveforms
are normal
OK
Replace U401
Reinsert or check the
NG
Adapter/Inverter
section
NG
Replace D701, U701 or
U702
NG
Replace X401
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ASUS VB191T&S