LG MG810c Service Manual page 50

• Trouble Shooting Procedure
- Check the power supply
- Check the soldering of SIM socket
- Check the SIM
The soldering of SIM connector
The ABB(Syren) is broken.
START
Insert the SIM Card
is OK?
Yes
The all paths connected
to CN203 are OK?
Yes
The SIM Card is OK?
Yes
Change the board.
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4. TROUBLE SHOOTING
No
Resolder the
CN203.
No
Resolder the
R226, C225, C226, C227, C223
No
SIM card is broken.
Change the SIM Card.