Acer B223W Service Manual page 32

2. No Picture (LED is orange)
The button if under
control
Measure
and U702 PIN2=1.8V
Check X201 oscillate
waveform is normal
Check HS/VS from
CN101 is normal
Replace U202
No picture
OK
U701 PIN2=3.3V
OK
NG
OK
OK
NG
X201
waveform is normal
OK
Check reset circuit of
U202 is normal
Replace U202
NG
Replace U701, U702
Replace X201
NG
Check Correspondent
component
32
NG
oscillate
Replace X201
NG
OK
Check Correspondent
component