LG L240 Service Manual page 71

4. TROUBLE SHOOTING
YES
The soldering of SIM
connector is OK?
YES
The all paths connected
to J201 are OK?
YES
Check the SIM_RST,
SIM_CLK, SIM_IO, VRSIM
YES
The SIM Card is OK?
YES
The DBB(U102) is broken.
Change the board.
START
Insert SIM
NO
NO
POWER ON
NO
SIM_CLK (R218)
(C206)
SIM_RST
SIM_IO
(C209)
- 72 -
Resolder the
J201..
Resolder the
R211, R218, C206, C207, C208, C209
NO
SIM card is broken.
Change the SIM Card.