Acer packardbell viseo 193ws Service Manual page 31

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2. No Picture (LED is orange)
The button if under control
Measure U703 PIN2=3.3V
X401
normal
Check HS/VS from CN101 is
normal
No picture
NG
OK
OK
oscillate
waveform
NG
OK
NG
OK
Replace U401
Replace the key button
NG
Check U703,C706 and C707
is
Replace X401
Check Correspondent component
31

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