Toshiba Portege M100 Maintenance Manual page 89

2.11 Modem Troubleshooting
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 System Board. Or the MDC , 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 cable is firmly connected to PJ3022 on the System Board
and make sure the MDC is firmly connected to PJ3020 on the System Board.
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 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 3.
Check 3 The system board may be defective or damaged. Replace the System Board with a
new one following the steps in Chapter 4, Replacement Procedures.
PORTEGE M100 Maintenance Manual (960-452)
2 Troubleshooting Procedures
2-47