
19" LCD Color Monitor AOC 197Va
31
No picture (LED orange)
No picture
OK
OK
NG
NG
Measure U702 PIN2=3.3V
Replace U702
X401 oscillate waveforms are
normal
Replace X401
Check if the sync signal from computer
is output and video cable is connected
normally
Input the sync signal of
computer, or change the
cable
Replace U401
NG
OK
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