Toshiba PORTG R300 User Manual

 

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 

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. 

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. 

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[CONFIDENTIAL] 

PORTEGE R300 Maintenance Manual (960-591)