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Troubleshooting Procedures
2.18 Sound Troubleshooting
This section describes how to determine if the computer’s sound functions are functioning
properly. Perform the steps below starting with Procedure 1 and continuing with the other
procedures as required.
Procedure 1: Diagnostic Test Program Execution Check
Procedure 2: Connector Check
Procedure 3: Replacement Check
Procedure 1 Diagnostic Test Program Execution Check
Execute the Sound test in Sound Test program disk. Refer to Chapter 3, Tests and Diagnostics
for more information on how to perform the test program.
If any error is detected by the test, go to Procedure 2.
Procedure 2 Connector Check
The connection of sound system is shown in the following figure.
As the connection may be defective, disassemble the computer and check each connection. If
the problem still occurs, go to Procedure 3.
PORTEGE M780 Maintenance Manual (960-809) [CONFIDENTIAL] 2-61