Lenovo L222 Wide Service Manual page 31

22" LCD Color Monitor
(2). No Picture
X201 oscillate waveforms are normal
No picture
Measure U702 PIN2=1.8V
U701 PIN2=3.3V
OK
OK
Check if the sync signal from
computer is output and video cable
OK
Replace U401
NG
Replace U702 or U701
NG
Replace X201
Input the sync signal of
NG
computer, or change
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Lenovo L222 Wide