Acer V193W, Service Manual

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Service Guide Acer V193W
2. No Picture (LED is orange)
Check flow chart
for the no signal
No picture
Check signal wire /button
Check U701 Vout=3.3V;
Q703-out=1.8V
Replace signal wire
check X401 waveform
replaceU701,Q703,Q702,Q406
&around device
replace X401
Check CN101-HS/VS
Check U402 out
Check Correspondent
component
OK
NG
NG
NG
NG
OK
OK
OK
Replace U401
Updata soft data
OK
NG
3.White screen
Check connector
Replace Panel
White screen
Measure Q302-base
is low level?
Check Q301=5V
Or CN301
solder?
Check around
device
Check X401 waveform
Check U403/U402
Check flow chart
For the white screen
Replace X401
Check around
device
Updata soft
NG
OK
OK
OK
OK
NG
NG
NG
Replace U402/U403/U401
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