Toshiba Tecra M5 Maintenance Manual - Page 103

2.10 Modem Troubleshooting 2 Troubleshooting Procedures Procedure 2 Connector Check and Replacement Check The Modem is installed as a MDC (Modem Daughter Card). 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 CN3010 on the system board, and the MDC cable is connected to CN3011 on the system board and the connector of the MDC. 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 modem jack or MDC 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 4. Check 4 The system board may be defective or damaged. Replace it with a new one following the steps in Chapter 4, Replacement Procedures. TECRA M5 Maintenance Manual (960-542) [CONFIDENTIAL] 2-49