No Audio

Discussion in 'Mac Pro' started by vinny., Jan 10, 2013.

  1. macrumors newbie

    Joined:
    Nov 16, 2012
    #1
    I have a 2007 Mac pro,
    2x dual core xeon, lion 10.7, NVIDIA GeForce 7300 GT 256MB, 24gb ram, 250gb ssd, 3tb sata hdd.

    I have had no audio now for a few weeks, it first happened when I tried updating my graphics card to a gtx 560 graphics card, so I thought this was the problem, so I downgraded back to the GeForce 7300 GT and reinstalled lion 10.7, (before that I had updated to 10.7.5, many people also complained about no audio with this update), so I reinstalled lion to 10.7 hoping this might fix it, but it doesn't. I have reinstalled to factory settings, resetted pram settings, resetting smc settings, tried booting in safe mode, I have repaired disk permissions, I have verified disk permissions, on all disks. I don't know what else to do.

    headphones dont work, built in audio doesnt work, external speakers don't work.

    my computer works fine in every other way, but the audio won't work.

    Has anyone got any ideas?
     
  2. macrumors 6502a

    Joined:
    Dec 28, 2009
    Location:
    UK
    #2
    Does a device plugged into the headphone jack at the front of the tower get detected as headphones in system preferences?
     
  3. thread starter macrumors newbie

    Joined:
    Nov 16, 2012
    #3
    no nothing gets detected, it only happened when updating to 10.7.5 the first time, but now I have reinstalled lion to 10.7 and still no change.
     
  4. macrumors 68040

    666sheep

    Joined:
    Dec 7, 2009
    Location:
    Poland
    #4
    Reset PRAM should help if it isn't hardware issue. If it didn't... you can try to hold keys until third reboot.
     
  5. macrumors 6502a

    Joined:
    Jun 26, 2007
    Location:
    California
    #5
    with ML did you check the audio sound output device? maybe it was defaulting to AirPlay?
     

    Attached Files:

  6. thread starter macrumors newbie

    Joined:
    Nov 16, 2012
    #6
    I already said it does not detect any sound device, internal or external, so there is no airplay or speaker or headphone or anything..

    I don't have mountain lion, mountain lion is not compatible with my computer, i have lion 10.7.

    (attached is pic of what it looks like in system pref)
     

    Attached Files:

  7. thread starter macrumors newbie

    Joined:
    Nov 16, 2012
    #7
    I have tried this a few times, its doesn't change anything. Maybe its hardware issue, but it was working fine before I updated lion the first time. seems a bit of a coincidence.
     
  8. macrumors 68040

    666sheep

    Joined:
    Dec 7, 2009
    Location:
    Poland
    #8
    Do you mean 10.4?
     
  9. macrumors 601

    GermanyChris

    Joined:
    Jul 3, 2011
    Location:
    Here
    #9
    It's funny on 10.6 I was getting cutout I upgraded to 10.7 und alles normal
     
  10. macrumors 601

    OrangeSVTguy

    Joined:
    Sep 16, 2007
    Location:
    Northeastern Ohio
    #10
    As already mentioned. Reset the PRAM. I had the same issue and pram reset fixed it. Actually had the problem a few times and the pram reset gets the audio back.
     
  11. thread starter macrumors newbie

    Joined:
    Nov 16, 2012
    #11
    As I have already said a bunch of times, I have tried this, quite a few times, 2 x chimes and 3 x chimes and 4 x chimes, but nothing worked.

    I finally got an answer from someone who's a friend of a friend and makes hackintosh's, he told me to delete the all hd extension plugins in library - system - extensions, and for some reason it worked, even though before this I did an erase and install, I guess there is something wrong with the extensions in lion or something.
     

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