Toshiba A20-S259 Maintenance Manual - Page 98

2 Troubleshooting Procedures 2.10 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 sound board, or the sound board and the system board. Or the MDC, the sound board, the 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 PJ3010 on the sound board, and the RJ-11 Jack (modem jack) is firmly connected to MDC JP1. 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 RJ-11 jack may be defective or damaged. Replace the RJ-11 jack 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 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 4. Check 4 The sound board or system board may be defective or damaged. Replace the sound board or system board with a new one following the steps in Chapter 4, Replacement Procedures. 2-48 Satellite A20 Maintenance Manual (960-444)