Trouble Shooting - Lenovo L193 Wide Service Manual

19" LCD Color Monitor

8.2 Trouble Shooting

8.2.1 Main Board
No power
Press power key and look
if the picture is normal
NG
Please reinsert and make sure
the AC of 100-240 is normal
OK
Measure U701 PIN2=3.3V
U702 PIN2 =1.8V
OK
X201 oscillate waveforms
are normal
OK
Replace U401
NG
Reinsert or check the
Adapter/Inverter section
NG
Check CN401, U701, U702,
NG
Replace X201
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Lenovo L193 Wide