Toshiba Portege M100 Maintenance Manual - Page 89

2.11 Modem Troubleshooting 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 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) 2-47