LG KE800 Service Manual page 49

4. Trouble Shooting
START
Check All of SIM card voltage
KE800 supports 3V SIM only
Make sure the connection between
main PCB and KEY PCB is properly.
No
J601 All 8 pins
Repair it
are soldered well?
Yes
No
Replace the damaged
Q601 is working?
part
Assemble
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