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2 Troubleshooting 2.14 Sound Troubleshooting
2.14 Sound Troubleshooting
To check if the sound function is defective or malfunctioning, follow the troubleshooting
procedures below as instructed.
Procedure 1: Diagnostic Test Program Execution Check
Procedure 2: Connector Check
Procedure 3: Replacement Check
Procedure 1 Diagnostic Test Program Execution Check
Insert the Sound test program in the USB floppy disk drive, turn on the computer and run the
test. Refer to Chapter 3, Tests and Diagnostics, for details.
If any error is detected by the test, go to Procedure 2
Procedure 2 Connector Check
The speaker, internal microphone, external microphone and headphone are connected to the
system board shown in the following figure. These connections may be loose or cables may
come off. Disassemble the computer referring to the steps described in Chapter 4 and make
sure each connection. If there is still an error, perform Procedure 3.
Procedure 3 Replacement Check
Check 1 If the speaker or headphone is not working properly, it may be faulty. Replace it
with a new one. If there is still an error, go to Check 3.
Check 2 If the external microphone or internal microphone is not working properly, it may
be faulty. Replace it with a new one following the step in Chapter 4. If there is still
an error, go to Check 3.
Check 3 The system board may be faulty. Replace it with a new one following the step in
Chapter 4.
2-50 [CONFIDENTIAL] Satellite R20/TECRA M7 Maintenance Manual (960-572)