HT201177: Get help with video issues on external displays connected to your Mac

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Maryfromwy

Q: i have lost the sound on my MacBook Pro

I had sound yesterday and today nothing. Anyone know how to fix it?

MacBook Pro, Mac OS X (10.6.8)

Posted on Aug 17, 2012 3:41 PM

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Q: i have lost the sound on my MacBook Pro

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  • by dominic23,

    dominic23 dominic23 Aug 17, 2012 4:00 PM in response to Maryfromwy
    Level 8 (41,783 points)
    Mac OS X
    Aug 17, 2012 4:00 PM in response to Maryfromwy

    1. If you see red light in the headphone port, plug the headphone into and out of the port

       

        5or 6 times to flip the microswitch inside. Sound may be stuck in digital mode.

     

    2. System Preference > Sound > Output

        Make sure that Internal Speakers are selected and the box Mute is not checked.

    3. Reset SMC.   http://support.apple.com/kb/HT3964

       Choose the method for:

      "Resetting SMC on portables with a battery you should not remove on your own".

    4. Reset PRAM  http://support.apple.com/kb/PH4405

  • by sanjampet,

    sanjampet sanjampet Aug 17, 2012 4:10 PM in response to Maryfromwy
    Level 5 (7,874 points)
    Aug 17, 2012 4:10 PM in response to Maryfromwy

    Maryfromwy,

     

    Sometimes a micrcoswitch gets stuck,, plug some different headphones GENTLTY in and out of the headphone jack. (as all jacks are not really he the same size).

     

    Another trick is to take a Q tip and cut the tip off, and GENTLY place it in the the headphone jack and GENTLTY masssage the input to reset the output to analog from digital.

     

    You can tell if it has been switched to digital by looking into the headphone jack and see a re light..

     

    You can try a SMC reset:

    Power down the machine, Power up the the machine, and press the keys , left side shift, control, option, before the star up chime, hold the keys till the gear stops spinning.

     

    Try it know , if it does not not work, reoot.

     

    Hope this helps