Acer B193R Service Manual - Page 31

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2. No Picture (LED is orange)
No picture
The button if under
control
OK
Measure U301 Pin2=3.3V,
U304 Pin2=1.8V
OK
Check X201 oscillate
waveform is normal
OK
Check HS/VS from
CN101 is normal
OK
Replace U203
NG
X201 oscillate
waveform is normal
Check reset circuit of
U203 is normal
Replace U203
NG
Replace U301, U302
NG
Replace X201
NG
Check Correspondent
component
31
NG
Replace X201
OK
NG
OK
Check Correspondent
component