Lenovo L197 Wide Service Manual page 31

19" LCD Color Monitor
(2). No Picture
No picture
The button if under
control
OK
Measure U701 Pin2=3.3V,
OK
Check X401 oscillate
waveform is normal
OK
Check HS/VS from
CN101 is normal
OK
Replace U401
NG
X401 oscillate
waveform is normal
Check reset circuit of
U401 is normal
Replace U401
NG
Replace U701
NG
Replace X401
NG
Check Correspondent
component
31
NG
Replace X401
OK
NG
OK
Lenovo L197 Wide
Check Correspondent
component