LG KM500 Service Manual page 80

Insert SIM
YES
The solde rin g of SIM
conne ctor is OK?
YES
The all p ath s co nnected
to J700(main key) are OK?
YES
Check th e SIM_RST,
SIM_CLK, SIM_IO, VRSIM
YES
The SIM Card is OK?
YES
The DBB(U10 3) is broken.
Change th e bo ard .
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Only for training and service purposes
START
POWER ON
NO
Re-solde r the
J700 o f th e main key ..
NO
Re-solde r the
R709, C701, C702, C703, C704 (main
key)
NO
Check connection of the Main, Main
key , Main FPCB
NO
SIM card is b roken .
Change the SIM Card.
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4. Trouble Shooting
LGE Internal Use Only