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sound not working macbook pro

395 Views 3 Replies Latest reply: Feb 21, 2013 4:53 AM by dominic23 RSS
Frederikhs Level 1 Level 1 (0 points)
Currently Being Moderated
Feb 20, 2013 5:42 AM

I am unable to controll the speakers on my Macbook Pro 13" Mid 2012. But when i have headphones in my sound is fine.

When i try to controll the volume on my keyboard there's just a "/" over the sound icon


Any help appreciated

  • dominic23 Level 6 Level 6 (18,520 points)
    Currently Being Moderated
    Feb 20, 2013 6:58 AM (in response to Frederikhs)

    Hopefully one of these steps should solve the problem.

    System Preference > Sound > Output > Internal Speakers

    Make sure Mute is not enabled.


    Remove the headphone.


    If you see red light in the headphone port, plug the headphone

    in and out of the port 5 or 6 times to flip the microswitch inside.

    Sound output may be stuck in the digital mode.


    Reset PRAM.


    Reset SMC.


    Choose the method for:

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


  • dominic23 Level 6 Level 6 (18,520 points)
    Currently Being Moderated
    Feb 21, 2013 4:53 AM (in response to Frederikhs)

    1. Restart.  Click the speaker icon in the menu bar.




    2. Finder > Applications > Utilities > Audi MIDI Setup > Audio Devices


        Built-in Output


        Make sure that nothing is selected under "Mute"  on the right side pane.




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