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iMac has sporadic sound problems

258 Views 4 Replies Latest reply: Dec 10, 2013 5:25 PM by CrowdedBlouse RSS
Emily Kessler Level 1 Level 1 (35 points)
Currently Being Moderated
Jul 24, 2012 3:36 PM

I'm writing on behalf of my parents who own an iMac and frequently call me for tech support.  This problem has me boggled. 

 

They have no sound, except when we go into System Preferences and test the sound there.  Then we can hear the alert sound.  But, when in any application, there is no sound.  We streamed YouTube videos - no sound.  We checked email (preferences are set to use sound when an email arrives), but still no sound. 

 

I have no idea what to try next. 

 

Thanks.

MacBook Pro, Mac OS X (10.7.2)
  • rkaufmann87 Level 8 Level 8 (40,500 points)
    Currently Being Moderated
    Jul 24, 2012 3:38 PM (in response to Emily Kessler)

    Google iMac Reset PRAM and then send your folks the instructions.

  • rkaufmann87 Level 8 Level 8 (40,500 points)
    Currently Being Moderated
    Jul 25, 2012 11:54 AM (in response to Emily Kessler)

    OK please let know the results, if that does not do it there are other things to try.

  • CrowdedBlouse Level 1 Level 1 (0 points)
    Currently Being Moderated
    Dec 10, 2013 5:25 PM (in response to Emily Kessler)

    I too, have sound problems. I have a 27" iMac late 2012 3.4Ghz OSX 10.9 with partial flash memory. It doesn't matter what the source of the sound is, the sound comes out in waves or pulses of volume, like you had a volume dial and were turning it partially up and down 10% every second. I use a Bose system, but the same thing happends with the computer's own speakers. The computer is only a few months old so it's a bit frustrating. There is no fan and no cd on this machine and this occurs even while listening to internet radio, so the hard drive isn't suspect. I also use an APC with AVR boost and trim on voltage.

     

    Any thoughts...

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