2.11 Modem Troubleshooting 2 Troubleshooting Procedures
QOSMIO F20 Maintenance Manual (960-526) [CONFIDENTIAL] 2-51
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 LAN/Modem/Bluetooth/IEEE1394 Test 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. If the modem malfunctions, these connections or boards may
be bad or the MDC might be faulty.
Disassemble the computer following the steps described in Chapter 4 and perform the
following checks:
Check 1 Make sure the following connections are firmly connected.
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 (RJ11) may be faulty. Replace it with a new one. If the problem
still occurs, perform Check 3.
Check 3 The MDC may be faulty. Replace it with a new one following the steps in Chapter
4. If the problem still occurs, perform Check 4.
Check 4 The system board may be faulty. Replace it with a new one following the
instruction in Chapter 4, Replacement Procedure.
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