2 Troubleshooting Procedures
dynabook PORTEGE A30-E/TECRA A30-G,-J/dynabook S Series Maintenance Manual(960-931) [CONFIDENTIAL] 2-35
If the problem still exists, 3G/LTE module, antenna, LTE board, USB FPC, or system board
may be faulty. Refer to Chapter 4, Replacement Procedures, for instructions on how to
disassemble the computer and then perform the following checks:
Check 1 3G/LTE module may be defective or damaged. Replace it with a new one and
perform Procedure 1 again. If the problem still exists, perform Check 2.
Check 2 LTE board may be defective or damaged. Replace it with a new one and perform
Procedure 1 again. If the problem still exists, perform Check 3.
Check 3 USB FPC may be defective or damaged. Replace it with a new one and perform
Procedure 1 again. If the problem still exists, perform Check 4 5.
Check 5 Antennas may be defective or damaged. Replace them with new ones and perform
Procedure 1 again. If the problem still exists, perform Check 6.
Check 6 System board may be defective or damaged. Replace it with a new one.
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