Toshiba Tecra A2-S239 Maintenance Manual - Page 99

LAN Troubleshooting

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2.12 LAN Troubleshooting 2 Troubleshooting Procedures 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 the LAN Test in the Diagnostic Program. (Sound/LAN/Modem test Program subtest 03 LAN test) Refer to Chapter 3, Tests and Diagnostics for more info rmation 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 mounted on the system board. The modem/LAN jack is connected to the system board by the cable. If the LAN malfunctions, the connection is bad or the system board might be faulty. Disassemble the computer following the steps described in Chapter 4 and perform the following checks: Check 1 Check if the LAN jack is connected firmly to the connector PJ4100 on the system board. If it is loose or disconnected, connect it firmly and return to Procedure 1. If there is still an error, perform Check 2. Check 2 The LAN jack may be defective. Replace the LAN jack with a new one. If the problem persist, perform Check 3. Check 3 The system board may be faulty. Disassemble the computer following the steps described in Chapter 4. Satellite A50/TECRA A2 Maintenance Manual (960-478) 2-45

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2.12
LAN Troubleshooting
2
Troubleshooting Procedures
Satellite A50/TECRA A2 Maintenance Manual (960-478)
2-45
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 the LAN Test in the Diagnostic Program. (Sound/LAN/Modem test Program
subtest 03 LAN test) 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 mounted on the system board. The modem/LAN jack is connected to
the system board by the cable. If the LAN malfunctions, the connection is bad or the
system board might be faulty.
Disassemble the computer following the steps described in Chapter 4 and perform the
following checks:
Check 1
Check if the LAN jack is connected firmly to the connector PJ4100 on the
system board.
If it is loose or disconnected, connect it firmly and return to Procedure 1. If
there is still an error, perform Check 2.
Check 2
The LAN jack may be defective. Replace the LAN jack with a new one. If the
problem persist, perform Check 3.
Check 3
The system board may be faulty. Disassemble the computer following the steps
described in Chapter 4.