Blackbag52
Level 1 (4 points)

Q: I recently restored from my time capsule and now have no sound

I did not plug my mb air into power when I went to bed the other night and the next morning my mb air would not turn on.  I attached power and gave it a few minutes then turned it on.  Seems like it lost a bunch overnight for some reason as the startup screen was different (like asking for my apple id and password).  Anyway, I finally signed in to the air and noticed that all my extensions in the browsers didn't work.  Then noticed that ALL my documents were missing so I did a complete restore from my time capsule.  My "boom" app then asked for my registration which I found and entered.  However, I had no sound from my internal speakers.  I then uninstalled boom.  Still no sound from my speakers.

 

In the apple preferences under sound input and output there is nothing to select.  HELP

 

Jack

MacBook Air, OS X Mavericks (10.9.4)

Posted on Sep 9, 2014 12:25 PM

by Linc Davis,Solvedanswer
Linc Davis Linc Davis
Level 10 (208,005 points)
Applications
A:

There are many possible causes for this issue. Take each of the following steps that you haven't already tried. Some may not apply to your model. Back up all data before making any changes.

1. Start with the steps recommended in this support article. Don't skip any of the steps. It's the starting point for further efforts to solve the problem.

2. Run Software Update and make sure you have a fully up-to-date installation of OS X.

3. If you've installed an application called "Memory Clean" or any other third-party software that is supposed to "clean" or "purge" memory automatically, remove it according to the developer's instructions and restart. You should do that even if the software is not causing the problem, because it's useless.

4. Other third-party software that has been reported to interfere with sound output includes "Boom" and "Samsung Kies." If applicable, uninstall according to the developer's instructions (not by dragging something to the Trash.)

5. If an AirPlay device is selected for sound output from iTunes (or from other applications via third-party software such as "Airfoil"), deselect it.

6. Launch the application "Audio MIDI Setup" by entering the first few letters of its name in a Spotlight search and selecting it in the results (it should be at the top.) Select Built-in Output from the list on the left. If the Mute boxes are checked, uncheck them.

7. If a red light is visible in the audio-out port when sound should be playing, the internal switch is stuck in the position for digital output. You may be able to free it by inserting and removing a mini-stereo jack of the proper size. Inserting any kind of tool in the port may cause damage that won't be covered by the warranty.

If there's no red light, the switch may still be stuck in the headphone position. Try to free it the same way.

8. Disconnect all wired peripherals except keyboard and mouse, if applicable. If more than one display is connected, disconnect all extra ones. Restart and test.

9. If you have a MacBook Air, turn off Bluetooth and restart.

10. Start up in safe mode. Don't log in; just restart as usual when the login screen appears. When you do, make sure the words "Safe Boot" do notappear in the login screen. If they do, the system is still in safe mode and sound won't work.

11. Reset the NVRAM.

12. Reset the SMC.

13. Triple-click anywhere in the line below on this page to select it:

/Library/Preferences/Audio

Right-click or control-click the highlighted line and select

          Services ▹ Reveal in Finder (or just Reveal)

from the contextual menu.* A folder should open with an item selected. Move the selected item to the Trash. You may be prompted for your administrator login password. Restart the computer and empty the Trash. Recreate your settings in the Sound preference pane.

*If you don't see the contextual menu item, copy the selected text to the Clipboard by pressing the key combination  command-C. In the Finder, select

          Go ▹ Go to Folder...

from the menu bar and paste into the box that opens by pressing command-V. You won't see what you pasted because a line break is included. Press return.

14. Reinstall OS X after backing up all data.

15. Make a "Genius" appointment at an Apple Store.

Posted on Sep 9, 2014 2:47 PM

Close
Blackbag52

Q: I recently restored from my time capsule and now have no sound

  • All replies
  • Helpful answers

  • by OGELTHORPE,

    OGELTHORPE OGELTHORPE Sep 9, 2014 1:15 PM in response to Blackbag52
    Level 9 (52,576 points)
    Mac OS X
    Sep 9, 2014 1:15 PM in response to Blackbag52

    Try a PRAM reset:

     

    http://support.apple.com/kb/ht1379

     

    Ciao.

  • by Linc Davis,Solvedanswer

    Linc Davis Linc Davis Sep 9, 2014 2:47 PM in response to Blackbag52
    Level 10 (208,005 points)
    Applications
    Sep 9, 2014 2:47 PM in response to Blackbag52

    There are many possible causes for this issue. Take each of the following steps that you haven't already tried. Some may not apply to your model. Back up all data before making any changes.

    1. Start with the steps recommended in this support article. Don't skip any of the steps. It's the starting point for further efforts to solve the problem.

    2. Run Software Update and make sure you have a fully up-to-date installation of OS X.

    3. If you've installed an application called "Memory Clean" or any other third-party software that is supposed to "clean" or "purge" memory automatically, remove it according to the developer's instructions and restart. You should do that even if the software is not causing the problem, because it's useless.

    4. Other third-party software that has been reported to interfere with sound output includes "Boom" and "Samsung Kies." If applicable, uninstall according to the developer's instructions (not by dragging something to the Trash.)

    5. If an AirPlay device is selected for sound output from iTunes (or from other applications via third-party software such as "Airfoil"), deselect it.

    6. Launch the application "Audio MIDI Setup" by entering the first few letters of its name in a Spotlight search and selecting it in the results (it should be at the top.) Select Built-in Output from the list on the left. If the Mute boxes are checked, uncheck them.

    7. If a red light is visible in the audio-out port when sound should be playing, the internal switch is stuck in the position for digital output. You may be able to free it by inserting and removing a mini-stereo jack of the proper size. Inserting any kind of tool in the port may cause damage that won't be covered by the warranty.

    If there's no red light, the switch may still be stuck in the headphone position. Try to free it the same way.

    8. Disconnect all wired peripherals except keyboard and mouse, if applicable. If more than one display is connected, disconnect all extra ones. Restart and test.

    9. If you have a MacBook Air, turn off Bluetooth and restart.

    10. Start up in safe mode. Don't log in; just restart as usual when the login screen appears. When you do, make sure the words "Safe Boot" do notappear in the login screen. If they do, the system is still in safe mode and sound won't work.

    11. Reset the NVRAM.

    12. Reset the SMC.

    13. Triple-click anywhere in the line below on this page to select it:

    /Library/Preferences/Audio

    Right-click or control-click the highlighted line and select

              Services ▹ Reveal in Finder (or just Reveal)

    from the contextual menu.* A folder should open with an item selected. Move the selected item to the Trash. You may be prompted for your administrator login password. Restart the computer and empty the Trash. Recreate your settings in the Sound preference pane.

    *If you don't see the contextual menu item, copy the selected text to the Clipboard by pressing the key combination  command-C. In the Finder, select

              Go ▹ Go to Folder...

    from the menu bar and paste into the box that opens by pressing command-V. You won't see what you pasted because a line break is included. Press return.

    14. Reinstall OS X after backing up all data.

    15. Make a "Genius" appointment at an Apple Store.

  • by Blackbag52,

    Blackbag52 Blackbag52 Sep 9, 2014 7:15 PM in response to Linc Davis
    Level 1 (4 points)
    Sep 9, 2014 7:15 PM in response to Linc Davis

    I would like to thank both Ogelthorepe and especially Linc Davis.  Nothing worked until I did "step 14, reinstall OS X".  That did it.  Now I have both the output and input listing in the sound preferences.

     

    I'm still bewildered as to what happened during the evening to my mb air but it is great to have sound back.

     

    Thanks a lot guys.

     

    Jack