Toshiba M200-ST2002 Maintenance Manual - Page 81

2.10 Modem Troubleshooting 2 Troubleshooting 2.10 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 program available as part of the maintenance test program. This program checks the modem. See Chapter 3 for information on how to perform the test. If any error is detected by the test, go to Procedure 2. Procedure 2 Connector Check and Replacement Check The Modem jack (RJ11) is mounted on the system board and MDC is connected to the system board. If the modem malfunctio ns, the connection 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 is firmly connected to the PJ3020 and the MDC cable is connected to the PJ3021 on the system board. System board PJ3020 PJ4100 PJ3021 RJ11 MDC 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 MDC may be faulty. Replace it with a new one following the steps in Chapter 4. If the modem is not still working properly, perform Check 3. Check 3 The system board may be faulty. Replace it with a new one following the instructions in Chapter 4. Portege M200 Maintenance Manual (960-457) 2-43