Lenovo A316 Troubleshooting Manual - Page 32

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Lenovo A316 Troubleshooting Manual
3.18 No SIM
Teardown check the connection condition of
RF antenna, can reassemble the general card
Check the transceiver IC, PA and surrounding
devices welding is good
No SIM
Replace a new SIM card
N
Check
whether
write
number and the IMEI number
Y
N
N
Replace Modem Chip
Y
OK
N
SN
Rewrite SN number and
the IMEI number
Y
Y
OK
OK
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