Topview A2281Wd+, Service Manual

Page: 36 / 54

22” LCD Color Monitor Topview
36
No Picture (LED orange)
No picture
The button if under
control
X401 oscillate
waveform is normal
Replace U401
Replace X401
Check C704(+) =1.8V
U701Vout =3.3V
Check Correspondent
component
Replace U401
Check X401 oscillate
waveform is normal
Check CN701 or replace U701
and C704
OK
OK
OK
OK
OK
NG
NG
NG
NG
Check reset circuit of
U401 is normal
Check HS/VS from
CN101 is normal
Replace X401
Check Correspondent
component
NG
NG
OK
OK