Maintenance Manual (960-948) 2-21
Troubleshooting Procedures
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 re-
insert it surely. Then perform Procedure 1 again. If the problem
still exists, perform Check 2.
Check 2
The connection of 3G antenna cables (MAIN, AUX) may be
loose or connected connector is wrong. Connect 3G antenna
cable correctly to the 3G/LTE module. Then perform Procedure
1 again. If the problem still exists, perform Check 3.
Check 3
The connection between 3G/LTE module and System board
may be loose. Connect 3G/LTE module surely to the System
board. Then perform Procedure 1 again. If the problem still
exists, go to procedure 3.
2.12.3 Replacement Check
The SIM card or SIM tray may be defective or damaged. Replace it with a
new one following the instructions in Chapter 4, Replacement Procedures.
If the problem still exists, 3G/LTE module, antenna or system board may
be faulty. Disassemble the computer following the steps described in
Chapter 4, Replacement Procedures, and perform the following checks:
Check 1
3G/LTE module may be defective or damaged. Replace it with a
new one following the instructions in Chapter 4, Replacement
Procedures and perform Procedure 1 again. If the problem still
exists, perform Check 2.
Check 2
Antennas may be defective or damaged. Replace them with new
ones following the instructions in Chapter 4, Replacement
Procedures and perform Procedure 1 again. If the problem still
exists, perform Check 2.
Check 3
System board may be defective or damaged. Replace it with a
new one following the instructions in Chapter 4, Replacement
Procedures.
2.13 Sound Troubleshooting
To check if the sound function is malfunctioning or not, follow the
troubleshooting procedures below as instructed.
Procedure 1: Check on Windows OS
Procedure 2: Connector Check
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