AOC 212Va - Display Issues Troubleshooting

22" LCD Color Monitor AOC 212Va
35
(2). No Picture
No
p
icture
OK
OK
NG
NG
Measure U702 PIN2=3.3V
D701(-)=1.8V
Replace U702, Q702 or
D701
X401 oscillate waveforms are normal
Replace X401
Check if the sync signal from
computer is output and video cable
Input the sync signal of
computer, or change
Replace U401
NG
OK