Macbook pro. No sound, no chime (everything else works ok)

Discussion in 'MacBook Pro' started by Martin Devek, Jan 10, 2016.

  1. Martin Devek macrumors newbie

    Joined:
    Jan 10, 2016
    Location:
    Dromore
    #1
    I now have no sound.Tried all the different fixes on here-plugging/unplugging earphones, PRAM, Reset the System Management Controller, etc, etc.

    Nothing works. Not getting any key noises, startup chime, basically its mute.

    Sound icon is NOT greyed out. If I go to system preferences>sound>output my internal speakers ARE selected, they are NOT greyed out, even lets me select volume etc.

    Can anyone help?


    MacBook Pro, Mac OS X (10.11.12), 2012 Macbook Pro
     
  2. DeltaMac macrumors 604

    DeltaMac

    Joined:
    Jul 30, 2003
    Location:
    Delaware
    #2
    Try another PRAM reset. (Restart, holding Option-Command-P and R)
    You should hear the boot chime. Keep holding the same 4 keys until you hear the boot chime sound two more times.
    If you don't get the boot chime sound, just keep holding the 4 keys while it resets two or three times, or simply hold the keys for a restart for about one minute, then release the keys and let it boot normally.
    If you NEVER hear the boot chime, then look inside the headphone port while power is on, and you are at the desktop.
    Do you see a red light inside the headphone port?

    If not, and you still hear no sound at all - plug earphones in. In firmly, pull out, then back in firmly. Repeat 3 or 4 times.
    Do anything that SHOULD give you audio, youtube video, iTunes music, etc.
    Do you get audio through the headphones? Double check that audio is turned up by pressing f12.
     
  3. Martin Devek thread starter macrumors newbie

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    Jan 10, 2016
    Location:
    Dromore
    #3
    DeltaMac, thank you so much for answering so quickly!

    Unfortunately, still no joy.

    NEVER heard the boot chime, no red light inside the headphone port. Tried 4 times in and out. Still no joy.
    Any other idea?
     
  4. DeltaMac macrumors 604

    DeltaMac

    Joined:
    Jul 30, 2003
    Location:
    Delaware
    #4
    No sound likely means - well, no sound.
    Do you get the volume icon that shows you that the volume is being adjusted on your screen when you hold f11 or f12 to try to change the volume?
    Do you get a "Mute" icon when you press f10? Press that a couple of times, the mute should toggle on an off.

    Finally, open your Sound pref pane, click the Output tab.
    Plug in headphones and wait a few seconds, maybe 10 seconds. Does the Output change to show that headphones are plugged in?
    Unplug the 'phones. Does it change back to "Internal speakers"?

    Final question - have you just recently noticed no sound?
    Have you recently installed new software/games or used some software that also uses your audio?
    Have you been inside your MacBook Pro, and could have disturbed some of the connectors on the logic board?

    And, you could boot to your built-in diagnostics, which may report a hardware error of some kind.
    (Restart, holding the D key. It will boot to the hardware test. Run both the standard and extended tests. Come back with any error codes that you see. )
     
  5. Martin Devek thread starter macrumors newbie

    Joined:
    Jan 10, 2016
    Location:
    Dromore
    #5
    Do you get the volume icon that shows you that the volume is being adjusted on your screen when you hold f11 or f12 to try to change the volume?
    YES
    Do you get a "Mute" icon when you press f10? Press that a couple of times, the mute should toggle on an off.
    YES
    Finally, open your Sound pref pane, click the Output tab.
    Plug in headphones and wait a few seconds, maybe 10 seconds. Does the Output change to show that headphones are plugged in?
    NO
    Unplug the 'phones. Does it change back to "Internal speakers"?
    NO
    Final question - have you just recently noticed no sound?
    Have you recently installed new software/games or used some software that also uses your audio?
    Have you been inside your MacBook Pro, and could have disturbed some of the connectors on the logic board?
    NO
    And, you could boot to your built-in diagnostics, which may report a hardware error of some kind.
    (Restart, holding the D key. It will boot to the hardware test. Run both the standard and extended tests. Come back with any error codes that you see. )
    EVERYTHING TESTED OK
     
  6. DeltaMac macrumors 604

    DeltaMac

    Joined:
    Jul 30, 2003
    Location:
    Delaware
    #6
    Which model of MBPro do you have (13-inch, 15-inch?)

    Sounds like everything is working, except you get no sound at all.
    I would take the case bottom off, and reseat the speaker connector(s) on the logic board.
     
  7. simonsi macrumors 601

    simonsi

    Joined:
    Jan 3, 2014
    Location:
    Auckland
    #7
    After that comprehensive set of actions unfortunately it sounds like the audio circuitry on the logic board (I think), has died.
     
  8. Martin Devek thread starter macrumors newbie

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    Dromore
    #8
    13inch. I m not sure where the reset button is but I will try to find info in the net about it.
    --- Post Merged, Jan 10, 2016 ---
    If that's would be the case, shouldn't the icon be greyed out and/or the internal speakers not shown in the system?
     
  9. simonsi macrumors 601

    simonsi

    Joined:
    Jan 3, 2014
    Location:
    Auckland
    #9
    Depends on the nature of the failure, the onboard diagnostics can't hear there is no noise so a failure in the amp stages won't necessarily be picked up but will give no audio.

    Also you seem to have ruled out any software issue by what does appear to work. Other than a complete OS reload <just> in case a driver is corrupt I can't think of anything else.
     
  10. Martin Devek thread starter macrumors newbie

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    #10
    I looked everywhere but I can't find how to "reseat the speaker connector(s) on the logic board."
     
  11. DeltaMac macrumors 604

    DeltaMac

    Joined:
    Jul 30, 2003
    Location:
    Delaware
    #11
    I think now that reseating the speaker connector is not a fix. After reviewing disassembly steps, left and right speakers have separate connectors on the logic board. I wrongly assumed that the 13-inch had both speakers in one connector.
    If you want to check that out yourself, here's a link to iFixit's online repair steps for your MBPro.

    So, no sound, no boot chime, even after a reset. No boot chime, even after a PRAM reset is a hardware issue, not software.
    The "disconnect", or common point, if there is one, is a broken headphone port, so that's what I'm thinking, as you don't get any response from the system when you plug in headphones, and no audio there, either.
    The damaged port is on the logic board. If that is actually good, then you are left with the sound chip, also on the logic board. The result from either is no sound from the normal audio output.
    The fix is to replace the logic board.
    Another fix, with much less expense, would be to use a USB sound card of some kind.
    But, that leaves your portable, well, less portable, as you would need that external dongle, plus external speakers/headphones if you want to play to any audio whatsoever.
    There would also be possible solutions with bluetooth, or thunderbolt external interfaces, but your internal audio is, so far, dead.
     

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