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2 Troubleshooting 2.9 LAN
2.9 LAN
To check if the computer’s LAN is defective or malfunctioning, follow the troubleshooting
procedures below as instructed.
Procedure 1 Test Program Check
Procedure 2 Connector Check and Replacement Check
Procedure 1 Test Program Check
Execute the LAN check program available as part of the maintenance test program. This
program will check the LAN. Insert the Bootable CD into the CD. Turn on the computer
and run the check program. See Chapter 3 for information on how to perform the check.
If any abnormal is detected by the check, go to Procedure 2
Procedure 2 Connector Check and Replacement Check
The LAN connector (RJ45) is mounted on the system board. If the LAN malfunctions, the
system board or CPU might be faulty.
Disassemble the computer following the steps described in Chapter 4 and perform the
following checks:
Check 1 The system board may be faulty. Replace it with a new one following the
instructions in Chapter 4. If the LAN is still not functioning properly,
perform Check 2.
Check 2 The memory may be defective. Replace the memory module with a new
one following the steps described in Chapter 4. If the problem persist,
perform Check 3.
Check 3 The CPU may be faulty. Disassemble the computer following the steps
described in Chapter 4 and replace the CPU with a new one.
2-20 Satellite M40/M45 TECRA A4 dynabook Vx/4 Maintenance Manual