Toshiba A3X manual Troubleshooting Procedures LAN Troubleshooting

2 Troubleshooting Procedures 2.12 LAN Troubleshooting

2.12 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

Execute LAN test in 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 LAN function is operated by the system board via LAN harness. If the LAN malfunctions, the connection among LAN cable, LAN harness and system board is bad or they might be faulty.

Disassemble the computer following the steps described in Chapter 4 and perform the following checks:

Check 1 Check if the LAN cable and LAN harness are connected firmly to the connectors.

LAN harness

CN4100

LAN cable

<System board>

If they are loose or disconnected, connect it firmly and return to Procedure 1. If there is still an error, perform Check 2.

Check 2 The LAN cable may be defective. Replace the LAN cable with a new one. If the problem persist, perform Check 3.

Check 3 The LAN harness may be defective. Replace the LAN harness with a new one. If the problem persist, perform Check 4.

Check 3 The system board may be faulty. Disassemble the computer following the steps described in Chapter 4.

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