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2 Troubleshooting Procedures 2.12 Modem Troubleshooting
2-42 PORTEGE A200 Maintenance Manual (960-499)
2.12 Modem Troubleshooting
To check if the modem 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 Modem test program available as part of the LAN/Modem/Bluetooth/IEEE1394
test program. This program checks the modem. 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 Modem jack and MDC board is connected to the system board. If the modem
malfunctions, these connections may be bad or the MDC or system board might be faulty.
Disassemble the computer following the steps described in Chapter 4 and perform the
following checks:
Check 1 Make sure the MDC is firmly connected to the PJ3010 on System board and the
MDC cable is firmly connected to the PJ3011 on the system board.
If any connector is disconnected, connect it firmly and return to Procedure 1. If
there is still an error, perform Check 2.
Check 2 The MDC cable may be faulty. Replace it with a new one. If the modem is not still
working properly, perform Check 3.
Check 3 The MDC may be faulty. Replace it with a new one following the steps in Chapter
4. If the modem is not still working properly, perform Check 4.