Toshiba SATELLITE U200 manual LAN Troubleshooting Troubleshooting Procedures

2.11 LAN Troubleshooting 2 Troubleshooting Procedures

2.11 LAN Troubleshooting

This section describes how to determine if the computer’s LAN is functioning properly. Perform the steps below starting with Procedure 1 and continue with the other procedures as required.

Procedure 1: Diagnostic Test Program Execution Check

Procedure 2: Connector Check and Replacement Check

Procedure 1 Diagnostic Test Program Execution Check

Execute the LAN test program available as part of the LAN/Modem/Bluetooth/IEEE1394 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 RJ-45 jack with LAN cable is connected to the system board. If the LAN malfunctions, the system board might be damaged.

Disassemble the computer following the steps described in Chapter 4, Replacement Procedures and perform the following check:

Check 1 Make sure the RJ-45 jack is firmly connected to CN4100 on the system board.

If the connectors are disconnected, connect it firmly and repeat Procedure 1. If the LAN function is still not functioning properly, perform Check 2.

Check 2 The system board may be defective or damaged. Replace it with a new one following the steps in Chapter 4, Replacement Procedures.

PORTÉGÉ M500 Maintenance Manual (960-559) [CONFIDENTIAL] 2-53