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Service Manual
(2). No Picture
X401 oscillate waveforms are normal
No picture
Measure U404 PIN2= 3.3V
Measure Q410
Collector
OK
OK
Check if the sync signal from computer
is output and video cable is connected
OK
Replace U401
= 1.8V
NG
Replace U404 or Q410
NG
Replace X401
NG
Input the sync signal of computer,
or change the cable
59
ASUS VH222S&VH222D
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