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Troubleshooting Guide - LG E1941S Service Manual

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Copyright © 2011 LG Electronics. Inc. All right reserved.
Only for training and service purposes

TROUBLESHOOTING GUIDE

No Power
(Power Indicator Off)
Please reinsert and
make sure the AC of
100-240V is normal
YES
Measure U701 PIN2
=3.3V
 
YES
Check X401 oscillate
waveforms are normal
YES
Replace U401
 
1. NO POWER
 
NO
NO
NO
- 19 -
Check the Adapter/Inverter
section
Check CN404 or replace
U701
Replace X401
 
LGE Internal Use Only

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