Toshiba libretto U100 Maintenance Manual page 96

2 Troubleshooting Procedures
Procedure 3 Replacement Check
• If headphone does not work properly, perform check 1.
• If external microphone does not work properly, perform check 2.
• If speaker does not work properly, perform check 3.
Check 1 The headphone may be faulty. Replace it with a new one following the steps in
Chapter 4. If the problem still occurs, perform Check 4.
Check 2 The external microphone may be faulty. Replace it with a new one following the
steps in Chapter 4. If the problem still occurs, perform Check 4.
Check 3 The speaker may be faulty. Replace it with a new one following the steps in
Chapter 4. If the problem still occurs, perform Check 4.
Check 4 The SD board may be faulty. Replace it with a new one following the instructions
in Chapter 4. If the problem still occurs, perform Check 5.
Check 5 The System board may be faulty. Replace it with a new one following the
instructions in Chapter 4.
2-52 [CONFIDENTIAL]
2.12 Sound Troubleshooting
libretto U100 Maintenance Manual (960-520)