Toshiba PORTEGE M400 - Manual (Page 97)

2.13 LAN Troubleshooting 2 Troubleshooting
2.13 LAN Troubleshooting
To check if the computer’s LAN is defective or malfunctioning, follow the troubleshooting
procedures below as instructed.
Procedure 1: Diagnostic Test Program Execution Check
Procedure 2: Connector Check and Replacement Check
Procedure 1 Diagnostic Test Program Execution Check
To check the LAN function, execute the Sound/LAN/Modem test program subtest 04 (LAN
test). See Chapter 3 for information on how to perform the test.
If any error is detected by the test, go to Procedure 2.
Procedure 2 Connector Check and Replacement Check
The LAN function is installed on the System board and the RJ45 jack and the controller is
mounted on the System board. If the LAN malfunctions, the System board might be faulty.
Disassemble the computer following the steps described in Chapter 4 and replace the System
board.
PORTEGE M400 Maintenance Manual (960-541) [CONFIDENTIAL] 2-49