Sim Detect Trouble Shooting - LG -E425 Service Manual

4.18 SIM detect Trouble Shooting

Measurement
VREG_RUIM1_3.0V
SIM1_RST
SIM1_IO
LGE Internal Use Only
START
Check "Dual SIM
Settings"
SIM is checked?
Yes
SIM Card is inserted correctly?
Yes
TP2 is 1.8V
or 3.0V?
Yes
TP1 is 1.8V
or 3.0V?
Yes
TP3 is 1.8V
or 3.0V and active?
Change the Main B/D
END
No
Check the SIM Slot.
No
insert SIM Card correctly
No
Change the Main B/D
No
Change the Main B/D
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4. TROUBLE SHOOTING
Only for training and service purposes