Modem Troubleshooting - Toshiba A100 VA3 - Satellite - Pentium Dual Core 1.6 GHz Maintenance Manual

2 Troubleshooting Procedures

2.11 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 maintenance test program. This
program checks the modem. See Chapter 3 for information on how to perform the test.
If any error is detected by the test, go to Procedure 2.
Procedure 2 Connector Check and Replacement Check
The Modem jack is connected to the MDC board 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 PJ3000 on 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 harness 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.
Check 4 The system board may be faulty. Replace it with a new one following the
instructions in Chapter 4.
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System Board
MDC PJ3000
2.11 Modem Troubleshooting
PORTEGE A100 Maintenance Manual (960-460)