Asus VB191T - 8.2 Trouble Shooting

19" LCD Color Monitor ASUS VB191T&S
42
8.2 Trouble Shooting
8.2.1 Main Board
(1). No Power
No power
Press power key and look
if the picture is normal
Please reinsert and make sure
the AC of 100-240 is normal
Reinsert or check the
Adapter/Inverter
section
X401 oscillate waveforms
are normal
Replace D701, U701 or
U702
Replace U401
Replace X401
OK
OK
OK
NG
NG
NG
NG
Measure U701 PIN2=3.3V
Measure U702 PIN2=1.8V