Toshiba Satellite A40 Maintenance Manual - Page 118

2.13 Sound Troubleshooting 2 Troubleshooting Procedures Procedure 3 Replacement Check Check 1 If the stereo speakers do not sound properly, the stereo speakers may be defective or damaged. Replace them with new ones. If the stereo speakers still do not work properly, go to Check 4. Check 2 If headphones does sound properly, the headphone jack may be defective or damaged, or the SD board may be defective. Replace the SD board with a new one. If the headphone still does not work properly, go to Check 4. Check 3 If the recording function by the external microphone does not work properly, the external microphone jack may be defective or damaged, or the SD board may be defective. Replace the SD board with a new one. If the recording function still does not work properly, go to Check 4. Check 4 The system board may be defective or damaged. Replace the system board with a new one following the instructions in Chapter 4, Replacement Procedures. Satellite A40 Maintenance Manual (960-458) 2-59