Lan Troubleshooting; Procedure 1 Diagnostic Test Program Execution Check; Procedure 2 Connector Check And Replacement Check - Toshiba Satellite L640 Maintenance Manual

Chapter 2 Troubleshooting Procedures

2.9 LAN Troubleshooting

To check if the computer's LAN is malfunctioning or not, follow the troubleshooting
procedures below as instructed.
Procedure 1:
Procedure 2:
Procedur e 1 Diagnostic Test Program Execution Check
Execute LA N test in the LAN test program. Refer to Chapter 3, Tests and Diagnostics
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 f unction is embedded on system board. If LAN malfunctions, its connection is
defective o r LAN cable and system board may be f
Check 1 Make sure LAN cable is firmly connected to the connector CN12. 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.
Satellite L600/L640/L645, Satellite Pro L600/Pro L640/Pro L645 Maintenance Manual (960-Q08)
Diagnostic Test Program Execution Check
Connector Check and Replacement Check
No Separated LAN BOARD ，it's assembled.
aulty.
for