Toshiba Satellite A350 Maintenance Manual page 63

2 Troubleshooting Procedures
Procedure 1
Try different audio sources (e.g. an audio CD and digital music file) to determine whether the
fault is in the speaker system or not. If not all sources have sound problem, the problem is in
the source devices. If all have the same problem, continue with Procedure 2.
Procedure 2
Connect a set if earphones or external speakers. If these function correctly, go to Procedure 3.
If they do not function correctly, the system board may be defective or damaged. Replace it
with a new one.
Procedure 3
Disassemble the computer following the steps described in Chapter 4, Replacement
Procedures and make sure the speaker cable is firmly connected to the audio board. If the
stereo speakers are still not functioning properly, go to Procedure 4.
Procedure 4
If the stereo speakers don't sound properly, the stereo speakers may be defective or damaged.
Replace them with new ones. If the stereo speakers still do not work properly, try replacing in
turn the audio board and system board.
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Figure 2-8 Speaker troubleshooting process
To determine if the computer's built-in speakers are functioning properly, perform
the following procedures. Figure 2-8 outlines the process. First
adjust the speaker volume to an appropriate level. Start with
Procedure 1 and continue as instructed.
Procedure 1: Audio source test
Procedure 2: Earphone test
Procedure 3: Connection check
Procedure 4: Replacement check
Audio source test
Earphone test
Connection check
Replacement check
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