Trouble Shooting - Lenovo L222 Wide Service Manual

22" LCD Color Monitor

8.2 Trouble Shooting

8.2.1 Main Board
(1). No Power
Please reinsert and make sure
the AC of 100-240 is normal
No power
Press power key and look
if the picture is normal
NG
OK
Measure
U702 PIN2=1.8V
U701 PIN2=3.3V
OK
X201 oscillate waveforms
are normal
OK
Replace U401
Reinsert or check the
NG
Adapter/Inverter
section
NG
Check U701 and U702
NG
Replace X201
30
Lenovo L222 Wide