dynabook TECRA A40-J Series Maintenance Manual

Maintenance Manual (960-945) 2-19
Troubleshooting Procedures
2.11 3G/LTE Troubleshooting
This section describes how to determine if the computer’s 3G/LTE is
functioning properly. Perform the steps below starting with Procedure 1 and
continuing with the other procedures as required.
Procedure 1: Module Installation Check
Procedure 2: Antenna/Connector Check
Procedure 3: Replacement Check
2.11.1 Procedure 1 Module Installation Check
Check 1
This procedure checks if the 3G/LTE module can be found on
the Windows application. Refer to Chapter 3, Tests and
Diagnostics for more information about that. If any problem is
found on that check, perform Procedure 2.
2.11.2 Procedure 2 Antenna/Connector Check
The 3G/LTE module, antennas and SIM card wiring diagram is shown
below:
Any of the connections may be defective. Disassemble the computer
following the steps described in Chapter 4, Replacement Procedures, and
perform the following checks:
Check 1
SIM card may not be firmly inserted. Remove it once and
reinsert it surely. Then perform Procedure 1 again. If the problem
still exists, perform Check 2.
Check 2
The connection between 3G/LTE module and USB board may
be loose. Connect 3G/LTE module surely to the USB board.
Then perform Procedure 1 again. If the problem still exists,
perform Check 3.
Check 3
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dynabook TECRA A40-J Series Specifications

General

Brand	dynabook
Model	TECRA A40-J Series
Category	Laptop
Language	English