Trouble Shooting - Lenovo L215P Service Manual

22" LCD Color Monitor

8.2 Trouble Shooting

8.2.1 Main Board
(1). No Power
No power
Press power key and look
if the picture is normal
NG
Please reinsert and make sure
the AC of 90-264 is normal
OK
Measure U701 PIN2=3.3V
Measure Q705 V =1.2V
collector
OK
X401 oscillate waveforms
are normal
OK
Replace U401
Reinsert or check the
NG
Adapter/Inverter section
NG
Replace U701, Q704, Q705
NG
Replace X401
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Lenovo L215P Wide