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2 Troubleshooting 2.11 LAN
Procedure 2 Connector Check and Replacement Check
The LAN function is installed on the system board. The 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 Make sure LAN cable is firmly connected to LAN jack. 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 Make sure LAN harness is firmly connected to the connector CN4100. If the
problem still occurs, perform Check 4.
Check 4 LAN harness may be faulty. Replace it with a new one. If the problem still occurs,
perform Check 5.
Check 5 System board may be faulty. Replace it with a new one following the instruction
in Chapter 4.
2-46 [CONFIDENTIAL] PORTEGE R200 Maintenance Manual (960-519)