AOC e941 Series Service Manual page 41

Service Manual
No picture (LED orange)
Whitescreen
White screen
Measure Q404-base
is low level?
OK
Check Q405=5V
Or CN403 solder?
OK
Check connector
Replace Panel
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No picture
Check signal wire
OK
Check U404 Vout=3.3V;
Q409-out=1.8V
OK
check X401 waveform
OK
Check CN101-RGB/HS/VS
OK
Check U402/U403 out
OK
Replace U401
NG
NG
Check around
device
NG
Replace signal wire
NG
replaceU404,Q409,Q410,Q405
&around device
NG
replace X401
NG
Check Correspondent
component
NG
Updata soft data
Check X401 waveform
OK
Check U403/U402
OK
Updata soft
Replace U402/U403/U401
41
AOCe941series
Check flow chart
for the no signal
Check flow chart
For the white screen
NG
Replace X401
NG
Check around
device