Lenovo 9220-HB1 Service Manual page 34

20" LCD Color Monitor
White screen
White screen
Measure Q702 base
is high level?
OK
Check Q702 and Q705 are
broken or CN407 solder?
NG
OK
Replace PANEL
NG
Check Correspondent
component.
34
X401 oscillate
waveform is normal
NG
OK
Check reset circuit of
U402 is normal
NG
Check Correspondent
component.
OK
Replace U402
Lenovo 9220-HB1
Replace X401