No Audio, tried EVERYTHING, Help!!!

Discussion in 'MacBook Pro' started by Vaimahina, Dec 19, 2016.

  1. Vaimahina macrumors newbie

    Joined:
    Aug 11, 2013
    Location:
    Chile
    #1
    No audio, nor headphones nor internal speakers. It's not that its stuck on digital mode. No chime on startup. It is not locked or anything, though occasionally grey and comes back to normal, but still never any sound. I followed online instructions: I checked the sound settings, inserted an Apple headphone jack several times in all sorts of recommended combinations, quit coreaudioid in Activity Monitor and in Terminal, reset PRAM/NVRAM, and SMC.I also tried to delete the Audio folder in Library Preferences as someone had suggested, but its locked. So no luck... I noticed this problem yesterday, but it may have occurred earlier... Nevertheless, yesterday morning when I turned on my computer the date was changed to Dec 31st 2014 at 10:00 pm (I'm not sure if this is related to the Audio problem). Another issue, but this one has been present from very early on, is that the jack gets VERY hot when charging the computer when it's turned on (again, not sure if it's related or not, or if it's even normal, since it has been that way from the beginning). The MagSafe isn't damaged at all. The computer is less than 2 years old and I got it after my earlier MacBook Pro had a motherboard problem before it was a year old. I live in Easter Island which means the nearest Apple place I can take it to is 3,900 kms away. The computer is running on Yosemite 10.10.5; I haven't been able to upgrade to El Capitan because the Internet on the island is very slow and the download keeps getting interrupted. I hope someone in this forum can help me, and I very much hope it's not a motherboard problem, again. I have a MBP 15" late 2015.
     
  2. Fishrrman macrumors G4

    Joined:
    Feb 20, 2009
    #2
    Not sure if this will help, but…

    Try booting in safe mode:
    - Shut down (power all the way off)
    - Press restart button
    - IMMEDIATELY hold down the shift key and keep holding it down.

    When you get to the finder, try the sound preference pane again.
    Does anything change?
     
  3. Vaimahina thread starter macrumors newbie

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    #3
     
  4. linguist macrumors member

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    Mar 31, 2009
    #4
    if Magsafe connector get very hot, it could be broken charger cable. one of the conductor inside the cable is compromised (the one with the magsafe connector)

    if you really need basic sound function quick, maybe try a cheap usb soundcard see if that might work as temporary fix.
     
  5. DeltaMac macrumors 604

    DeltaMac

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    Delaware
    #5
    What is the result if you boot to your Diagnostics test?
    Restart, holding the D key, then run the test. Any error codes?
     
  6. Vaimahina, Dec 19, 2016
    Last edited: Dec 19, 2016

    Vaimahina thread starter macrumors newbie

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    #6
    Hi, that is a good idea! It said my battery needs to be serviced, that I can still use it or may not notice anything wrong, but that i should take it in (code PPT004). Do you think that that may be causing the problem with the Audio?

    --- Post Merged, Dec 19, 2016 ---
    I should order a new Magsafe then. I will try that. I would be happy if at least one of the problems got solved. Regarding the sound I have Bluetooth one. I have a USB speaker, but like the headphones, no sound comes out of it. Maybe it is a software thing and it will work itself out when I go to the city in March and I may upgrade. I'm hoping the Bluetooth will work for now. Thank you for the suggestions! Very helpful even if I couldn't solve the main problem.
     
  7. DeltaMac macrumors 604

    DeltaMac

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    #7
    I think it is very unlikely that a battery fault could result in loss of audio.

    If you get no audio at all, even if you let the PRAM reset go through several cycles, but still no boot chime - and no other audio, not even from headphones, then likely the audio chip has failed. That needs a logic board replacement.
    If you just want audio, and can use external speakers, (and don't care about the boot chime) then you can try one of several USB audio adapters. That should at least get audio for you, just not as convenient as the built-in audio. Or, you should also try a bluetooth speaker. That should work, too.
     
  8. Vaimahina thread starter macrumors newbie

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  9. Vaimahina thread starter macrumors newbie

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    #9
    I was thinking, how could the sound fail out of the blue, without it being used? Thinking back, I remember now that a few days ago I was watching a movie through an external DVD drive and this became unplugged when I was putting my computer away, with the movie still running (I got sleepy and as I was shutting the lid, to put the computer to sleep, I inadvertently unplugged the DVD device). Later, when I used my computer again the Apple DVD screen came on with an error. It's possible that that caused the problem, and I didn't notice until a few days later. On another note, reviewing audio problems in other forums I saw someone suggest to erase the following files: Library/Preferences/Audio/com.apple.audio.DeviceSettings.plist and ./com.apple.audio.SystemSettings.plist I do not have those files, could that be the problem?
     
  10. DeltaMac macrumors 604

    DeltaMac

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    #10
    Yes, but you may be looking in the wrong Library folder. There's a minimum of three on ANY Mac, and easy to choose the wrong location. You will find the two files that you are looking for in /Library/Preferences/Audio/
    It's simple to look in the correct location, just go to the the Go menu in the Finder, choose Go To Folder, and enter that path exactly as I typed it:
    Code:
    /Library/Preferences/Audio/
    Even easier - copy and paste that address in that Go To Folder window.

    Delete the files, then restart your Mac.
    Hope it helps - but if you have already tried a PRAM reset, and no boot chime resulted, then it's unlikely to help at all.

    Be sure to try the PRAM reset once more (just to humor me :D )
    Use these steps, and follow exactly:
    Shut down, so your MacBook Pro is completely off.
    Press and release the power button, and immediately press and hold Command-Option-P and R
    You SHOULD hear a boot chime, but continue to hold the same 4 keys until you hear the boot chime 2 more times.
    The boot chime might not sound on the first reset, but on a working system should chime on the second reset if you continue to hold those 4 keys. Keep holding the same 4 keys even if you hear nothing, for a minimum of 30 seconds, then release the keys, to allow your system to boot up normally.
    The absence of a boot chime on that extra-long PRAM reset indicates a hardware problem, and is not a software issue.
    If you are holding the keys, yet you see a normal boot process (Apple icon, progress wheel or bar, login window, or desktop), then you are holding the wrong keys, or you didn't begin holding the keys immediately after press and release of the power button.
     
  11. Vaimahina thread starter macrumors newbie

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    Chile
    #11
    So I deleteted the files as per your instructions, and as you predicted no luck. I also tried resetting the PRAM as you mentioned, held it down for 40 seconds or so, and sadly no chime. I just don't see how the audio card could fail out of the blue, not being in use, with the computer being less than 1 year and 3 months old. My old macs lasted for ages without any sort of problem whatsover, and the last two have been a complete disaster... I want the quality of the old Macs back...


     
  12. DeltaMac macrumors 604

    DeltaMac

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    #12
    I wonder if it can be a result of the climate where you live. High humidity and electronics are not good partners.
     
  13. linguist macrumors member

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    Mar 31, 2009
    #13
    the laptop doesn't seem that old, and no obvious error, maybe something get stuck inside the audio jack, or the jack itself fails
     
  14. MH01 macrumors G4

    MH01

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    Feb 11, 2008
    #14
    Hate to say it, it's one of those situations you resort to a reinstall . I suspect its an Os issue, something got its panties in a twist .

    I'd suggest trying boot camp to see if windows detects it , if you have a copy handy.
     
  15. Vaimahina thread starter macrumors newbie

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    #15
    Yes, I thought about that because it had rained for a solid week, heavy rains, and it was very humid...
    --- Post Merged, Dec 22, 2016 ---
    I'll try that. Thanks for the suggestion. I'll try anything and everything
    before taking it into to the Mac Doctor in Santiago. I just feel that when they open it up, then they mess up something else. Soon after, random things start failing...
    --- Post Merged, Dec 22, 2016 ---
    I don´t think its the audio jack, because it wasn't in use and there is no red light or anything, but I do think it may be the Audio card failing, OR perhaps that something got "twisted" when an external Hard Drive I had been watching movie got disconnected by mistake... I like to think it's the latter... But thanks for trying to help me out and I will definitely have to lookm into the battery and MagSafe as you had suggested earlier.
     
  16. Vaimahina thread starter macrumors newbie

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    Chile
    #16
    Ok. Not sure WHAT is going on... yesterday, holding the computer on my lap when charging, I got zapped twice (by an electrical discharge). Last night I used my computer (unplugged) and after turning it on and hearing a very muted clicking sound instead of the chime, I decided to mute the sound in case it could damage the card further having it on. Well, this morning after waking it up from hibernation, the sound is back. I tested it with iTunes and Youtube and it's working, but it won't make any sound when I push the volume up or down on the menu icon, which it used to, but the controls work ("Play interface sound effects" is on). Very strange. I'm almost afraid to turn it off. The zapping is probably unrelated, but the whole thing makes me think that I really should get a new MagSafe adapter, and the pins look fine in both jacks, but the space all around them is dark on the computer side, apparently from it being so hot (I would guess--this is something that has been that way from the very beginning, and because I never had a problem with my Macs I figured it was normal. I might try cleaning it with a cotton swab and alcohol... ANYway, thanks you all for listening and giving me great advice and trying to help me out. I appreciate all the help you gave me! Happy Holidays to you all!
     

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