(Power Indicator Off)
Check X401 oscillate
waveforms are normal
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Only for training and service purposes
TROUBLESHOOTING GUIDE
No Power
Please reinsert and
make sure the AC of
100-240V is normal
YES
Measure
U702 PIN2=3.3V
YES
YES
Replace U401
1. NO POWER
NO
NO
NO
- 17 -
Check the Adapter/convert
section
Check CN702 or
replace U702
Replace X401
LGE Internal Use Only