Imac 24" no sound through internal speakers

Discussion in 'iMac' started by sandersc, Jul 2, 2011.

  1. sandersc, Jul 2, 2011
    Last edited: Jul 2, 2011

    sandersc macrumors newbie

    Jul 1, 2011
    Hi I have a 24" Imac6.1. My computer boots with the normal loud boom noise through internal speakers, but when I want to play music or any sound, there is nothing happening. The volume icon in the righthand top corner of the screen is greyed out.

    When I check the sound in system preferences it gives only the option "digital out - build-in output". No other options.

    When I however plug in external speakers into the earphone jack, I do get sound. When the speaker plug is pulled out, I do see the red light coming out of the socket as mentioned elsewhere on the forum.

    I did plug the jack in and out several times without anything changing.

    Anyone out there perhaps know how to fix it on my specific imac. It ia a 24" Imac6.1 with a C2D 2.16 processor, running snow leopard.

    Thanks a lot for reading this.


    PS I am new to the forum
  2. Detrius macrumors 68000

    Sep 10, 2008
    Asheville, NC
    You have a bad headphone jack. You need a new logic board.
  3. sandersc thread starter macrumors newbie

    Jul 1, 2011
    Does the sound have its own board and is it repairable?

  4. Nostromo macrumors 65816


    Dec 26, 2009
    Deep Space
    I had a similar problem after unplugging headphones.

    I plugged them in again, wriggled a bit, and then the sound was back on.

    And I never again touched the headphone jack.
  5. sandersc thread starter macrumors newbie

    Jul 1, 2011
    On which mac was this?
  6. Gramp macrumors newbie

    Jun 15, 2011
    Any chance you recently upgraded SL to 10.6.8?

    Have seen reports of this happening with other Leopard upgrades, but no-one has actually said how they fixed it.

    Is the machine is new to you, or is there anything else that was done immediately prior to this happening?
  7. sandersc thread starter macrumors newbie

    Jul 1, 2011
    I've bought the machine secondhand and then bought snow leopard and upgraded the imac to it.
  8. Gramp macrumors newbie

    Jun 15, 2011
    But did you check out it out before upgrading to SL to confirm everything was working, in particular the internal speakers?

    Possibly the previous owner did something that removed them physically or logically.

    If it was just the SL upgrade that did it, you will have to search for someone's solution to it - I just see open-ended threads.

    (Rant time - Unfortunately, a lot of forum members neglect to post when they do solve a problem.
    The knowledgebase depends on people closing the loop.)

    Any more educated guesses from someone?
  9. sandersc thread starter macrumors newbie

    Jul 1, 2011
    Thanks Gramp, unfortunately I didn't check to see whether it worked before I installed snow leopard.Hope somebody that found a solution will post.

  10. jamin100 macrumors 6502

    Sep 22, 2008
    I had this problem the other night with my 24" imac after updating to 10.6.8

    Here's roughly what i did to solve it (cant remember exactly)

    Go to system Preferences
    Click Sound
    Where it says "play sound effects through:" i had a few different options. I changed this to internal speakers (i had not other speakers or headphones plugged in)

    I dont know why the other options where there because i've just checked on my work imac (21.5) and it only lists internal

    hope this helps
  11. sandersc thread starter macrumors newbie

    Jul 1, 2011
    Mine only gives me the option "digital out" nothing else.
  12. jamin100 macrumors 6502

    Sep 22, 2008
  13. sandersc thread starter macrumors newbie

    Jul 1, 2011
    Yes I dont get the option of internal speakers. Apparently they can replace the headphone jack on the mainboard. Anybody heard about this before?
  14. Trouble1, Nov 17, 2011
    Last edited: Nov 17, 2011

    Trouble1 macrumors member

    Nov 18, 2007
    Out of nowhere, my iMac external speakers stopped working. I checked them using the MBP, they worked. Plugged in headphones, they didn't work.
    Did some searching and came across this thread.

    I ended up going into systems pref>Sound>Output> Under Type it read :confused: I don't remember.
    Went to Sound Effects and selected Play sounds effects through Headphones.
    Output volume I had to deselect Mute.
    The external speakers now work.
    Not sure what happened between a couple of days ago and today...the wife won't admit anything.

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