Toshiba A20-S259 - Satellite - Pentium 4 2.66 GHz Maintenance Manual page 98

2 Troubleshooting Procedures
Procedure 2 Connector Check and Replacement Check
The Modem is installed as a modem daughter card (MDC). If the modem malfunctions, there
may be a bad connection between the MDC and the sound board, or the sound board and the
system board. Or the MDC, the sound board, the system board or their connectors might be
damaged.
Disassemble the computer following the steps described in Chapter 4, Replacement Procedures
and perform the following checks:
Check 1 Make sure the MDC is firmly connected to PJ3010 on the sound board, and the RJ-11
Jack (modem jack) is firmly connected to MDC JP1.
If a connector is disconnected, connect it firmly and repeat Procedure 1. If the
Modem is still not functioning properly, perform Check 2.
Check 2 The RJ-11 jack may be defective or damaged. Replace the RJ-11 jack with a new one
following the steps in Chapter 4, Replacement Procedures. If the modem is still not
functioning properly, perform Check 3.
Check 3 The MDC may be defective or damaged. Replace it with a new one following the
steps in Chapter 4, Replacement Procedures. If the modem is still not functioning
properly, perform Check 4.
Check 4 The sound board or system board may be defective or damaged. Replace the sound
board or system board with a new one following the steps in Chapter 4, Replacement
Procedures.
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2.10 Modem Troubleshooting
Satellite A20 Maintenance Manual (960-444)