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5. TROUBLE SHOOTING
START
Check All of SIM card voltage
KC780 Series support
1.8V & 2.9V SIM only
No
Resolder
S401 soldered
connector
well?
Yes
No
Resolder
Check
connector
TP1(2V8),TP2
TP3
Yes
Yes
Replace Main
Check Proper
Board
SIM Card
Assemble
LGE Internal Use Only
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Only for training and service purposes
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Table of Contents
Troubleshooting
