Found no output devices

Discussion in 'MacBook Air' started by kate22, Mar 31, 2013.

  1. macrumors newbie

    Joined:
    Mar 31, 2013
    #1
    Two weeks ago, my MBA didn't make any sound and he didn't find any output devices. It was solved by resetting PRAM. Today I have the same problem, but the reset doesn't seem to work. If I restart, I get a black screen, normal screen , black screen and so on.
    When I check by hardware -->audio: it says audiocode:0
    Could it be possible to solve it or not?
    And if not, could a usb sound card be a solution?
    Thanks!
     
  2. macrumors 603

    justperry

    #2
  3. thread starter macrumors newbie

    Joined:
    Mar 31, 2013
    #3
    Did the test, found no hardware problem and the sound came back after the test.
    A relief!
    Thank you!
     
  4. thread starter macrumors newbie

    Joined:
    Mar 31, 2013
    #4
    And here we go again... no sound.
    The test said there was no hardware problem, but I have no idea what the problem could be.
     
  5. thread starter macrumors newbie

    Joined:
    Mar 31, 2013
    #5
    Still have no sound. Sometimes the sound is coming back, but this happens more infrequently.
    Also, when I try to play any kind of video, there is no sound obviously but the video doesn't play after a few seconds.
    Anyone an idea what it could be? Thanks!
     
  6. macrumors 6502a

    Satori

    Joined:
    Jun 22, 2006
    Location:
    London
    #6
    The sound problem might be resolved by resetting the SMC

    http://support.apple.com/kb/HT3964
     
  7. thread starter macrumors newbie

    Joined:
    Mar 31, 2013
  8. macrumors 603

    justperry

    #8
    Resetting PRAM/NVRAM maybe or repair permissions in Disk Utility.

    About NVRAM and PRAM
     
  9. thread starter macrumors newbie

    Joined:
    Mar 31, 2013
    #9
    Doesn't seem to work either.
    This seems destined to remain a mystery.
     
  10. macrumors 603

    justperry

    #10
    Install a clean OS on a USB stick, minimum 8 GB and see if it still has the issue, if not you know the OS is the problem, and have you logged into another account to see if it solves the problem?
    If not create one in Users & Groups, logout and into the new one and see if it is the same.
     
  11. thread starter macrumors newbie

    Joined:
    Mar 31, 2013
    #11
    I tried another account but the problem persisted.
    I'll try the install later tonight.
     
  12. macrumors demi-god

    JHUFrank

    Joined:
    Apr 16, 2010
    #12
    Is this happening with speakers, headphones or both?
     

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