Toshiba Portege M750 - Replacement Check

2.18 Sound Troubleshooting 2 Troubleshooting Procedures
PORTEGE M700/M750 Maintenance Manual (960-661) [CONFIDENTIAL] 2-59
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.
 If internal microphone does not work properly, perform check 4.
Check 1 Headphone may be faulty. Replace it with a new one following the steps in
Chapter 4, Replacement Procedures. If the problem still occurs, perform Check 5.
Check 2 External microphone may be faulty. Replace it with a new one following the steps
in Chapter 4, Replacement Procedures. If the problem still occurs, perform Check
5
Check 3 Speaker may be faulty. Replace it with a new one following the steps in Chapter 4,
Replacement Procedures. If the problem still occurs, perform Check 5
Check 4 Internal microphone may be faulty. Replace it with a new one following the steps
in Chapter 4, Replacement Procedures. If the problem still occurs, perform Check
5
Check 5 System board may be faulty. Replace it with a new one following the instructions
in Chapter 4, Replacement Procedures.