Toshiba A100 VA3 - Satellite - Pentium Dual Core 1.6 GHz Maintenance Manual page 86

2.13 Sound Troubleshooting
Procedure 3 Replacement Check
Check 1 If the speaker or internal microphone is not working properly, it may be faulty.
Replace it with a new one following the step in Chapter 4. If they are still not
working properly, go to Check 3.
Check 2 If the external microphone or the headphone is not working properly, the system
board may be faulty. Replace it with a new one following the step in Chapter 4.
PORTEGE A100 Maintenance Manual (960-460)
2 Troubleshooting Procedures
2-45