Toshiba Tecra M1 Maintenance Manual - Page 108

2 Troubleshooting Procedures 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 is firmly connected to PJ2017 on the systemboard, and the modem cable is connected to PJ1003 on the system board and the connector of the MDC. MDC (Modem daughter card) PJ2017 PJ1003 System Board Modem cable 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 or modem cable 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. 2-48 TECRA M1 Maintenance Manual (960 -436)