Acer H235H Service Manual page 37

2. No Picture (LED is orange)
No picture
The button if under
control
OK
Measure U104 Pin2=1.8V,
U103 PIN2=3.3V
OK
X401 oscillate
waveform is normal
Check HS/VS from
CN402 is normal
OK
Replace U401
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NG
NG
OK
NG
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X401 oscillate
waveform is normal
OK
Check reset circuit of
U401 is normal
OK
Replace U401
NG
Check CN101, U104 and U103
Replace X401
Check Correspondent
component
36
NG
Replace X401
NG
Check Correspondent
component