Acer B243W - Page 33

33
2. No Picture (LED is orange)
No picture
The button if
under control
X401 oscillate
waveform is normal
Replace U407
Replace X401
Measure U701, U702 Pin2=3.3V,
U703 Pin1=1.8V
Check Correspondent
component
Replace
U701,U702,
U703
OK
OK
OK
OK
NG
NG
NG
NG
Check reset circuit of
U407 is normal
Check HS/VS from
CN402 is normal
Check Correspondent
component
NG
OK
Replace U403