Toshiba Tecra A2-S239 Maintenance Manual - Page 98

2 Troubleshooting Procedures 2.11 Modem Troubleshooting 2.11 Modem Troubleshooting To check if the modem is defective or malfunctioning, follow the troubleshooting procedures below as instructed. Procedure 1 Diagnostic Test Program Execution Check Procedure 2 Connector Check and Replacement Check Procedure 1 Diagnostic Test Program Execution Check Execute the Modem Test in the Diagnostic Program. Refer to Chapter 3, Tests and Diagnostics for more information on how to perform the test program. If any error is detected, perform Procedure 2. Procedure 2 Connector Check and Replacement Check An MDC (Modem Daughter Card) is used as the modem for this computer. The MDC is connected to the system board by connector. If the modem malfunctions, the se connections may be bad or the MDC or system board might be faulty. Disassemble the computer following the steps described in Chapter 4 and perform the following checks: Check 1 Make sure the MDC has been firmly connected to the PJ3020 on the system board and the modem jack cable has been firmly connected to the JP1 on the modem. If any connector is disconnected, connect it firmly and return to Procedure 1. If there is still an error, perform Check 2. Check 2 The Modem jack may be faulty. Replace it with a new one. If the modem function is still not working properly, perform Check 3. Check 3 The MDC may be faulty. Replace it with a new one following the steps in Chapter 4. If the modem function is still not working properly, perform Check 4. Check 4 The system board may be faulty. Replace it with a new one following the instructions in Chapter 4 2-44 Satellite A50/TECRA A2 Maintenance Manual (960-478)