Lan Troubleshooting; Procedure 1; Diagnostic Test Program Execution Check; Connector Check And Replacement Check - Toshiba Satellite U400 Maintenance Manual

2.12 LAN Troubleshooting

To check if the computer's LAN is malfunctioning or not, follow the troubleshooting
procedures below as instructed.

Procedure 1:

Procedure 2:

Procedure 1

Diagnostic Test Program Execution Check

Execute LAN test in the LAN/Modem test program. Refer to Chapter 3, Tests and Diagnostics
for more information on how to perform the test program.
If any error is detected by the test, go to Procedure 2.
Procedure 2

Connector Check and Replacement Check

The LAN function is embedded on system board. If LAN malfunctions, its connection is
defective or LAN cable and system board may be faulty.
Check 1 Make sure LAN cable is firmly connected to the connector CN9. If the problem
still occurs, perform Check 2.
Check 2 LAN cable may be faulty. Replace it with a new one. If the problem still occurs,
perform Check 3.
Check 3 System board may be faulty. Replace it with a new one following the instruction in
Chapter 4.
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Diagnostic Test Program Execution Check

Connector Check and Replacement Check

Satellite U400/Satellite Pro U400/PORTEGE M800 Maintenance Manual
Chapter2Troubleshooting Procedures