MacBook Air no audio output device found ???????? *please help*

Hey

I had the same problem on my MacBook. The sound just stoped working. I brought it to the apple store and they did a fresh install. After the sound worked with the headphones but not the internal speakers. so they replaced the logic board ($400). It all worked good until I restored from my time machine back up. My backup was from after the sound stoped working, so I tried one from before the sound issue. Magically it worked again. I then just restored my recent files individually (not OSX again)

About a week ago it stoped again. I restored from a backup and it's worked fine since.

So before you go to the apple store to get it fixed, if you have a backup try restoring to it. Then just copying your files back. If you don't have a backup you could try doing a clean install of the latest version of OSX, then putting your flies back on. The only thing with doing a clean install is you would lose your preferences (you wouldnt if you restored from a full time machine backup)

Drew

Okay so I checked on another forum because my headphone jack also had a red led light on inside (never noticed that before) and it said that my the 'Digital Out' is enabled and in order to disable it i should wiggle a matchstick inside to release the switch.

Now i know what you're saying " I spent over a grand for her and I have to fix my favorite child with a **** match stick" well i totally agree with you. It's crazy but it worked.

So before you buy anything or disect your infant... TRY IT!!! Hope this helps.

I have a 2008 MacBook Air. The sound icon disappeared and the sound just went out on it a few days ago for the first time. I went to this forum and tried various things that seemed to work temporarily like a safe reboot or even removing a line from my Library Preferences. But I am now thinking that those might have been coincidental because last night when it went out right in the middle of something I was really into, in frustration, I slapped teh casing and the sound came right back. It kept happening and I kept slapping it and the sound came back every time if I slapped it enough times. Never more than a few so nothing abusive here. Then, by chance I grasped it by its lower right corner and noticed that if I held the casing firmly together at that point the sound worked consistently. I know very little about computers and I live four hours from the nearest Mac store. But, logically, this seems like a wiring issue, so I am going to try the advice given by several of you to go to ifixit.com and try to replace the audio cable - first by going through the motions as though I was replacing it as suggested by one person, then, if that doesn't work, by ordering a new cable and replacing it.

I think mine, along with some others above, is definately a wiring issue (connections coming loose from time to time) as I lost audio recently after plugging in a USB SD card reader (which is right next to the headphone port).

I tried the restart while inserting some headphones and jiggling it on startup and voila it worked!

This happens from time to time and despite opening up the case and detaching/reattaching the audio/speaker cables and its fitment to the sound card. Somehow a loose, faulty cable connection,

i think.

My daughters MacBook air 13 inch had the sudden loss of sound two months ago and the sound cable and logic board were replaced under warranty. Two days ago it was back. No sound ! Tried

1. Restart

2. Safe restart

3. Resetting the pram

4. Repaired permissions with apples disk utility, Mac cocktail

5. Used onyx to clear the audio files

No joy and no sound!

Then I read a thread about sound loss in other macs and deleting the following preference file:

~Library/Preferences/com.apple.BezelServices.plist

Deleted the file and restarted the MacBook air and the sound was back!!! I hope this helps you all

My daughters MacBook air 13 inch had the sudden loss of sound two months ago and the sound cable and logic board were replaced under warranty. Two days ago it was back. No sound ! Tried

1. Restart

2. Safe restart

3. Resetting the pram

4. Repaired permissions with apples disk utility, Mac cocktail

5. Used onyx to clear the audio files

No joy and no sound!

Then I read a thread about sound loss in other macs and deleting the following preference file:

~Library/Preferences/com.apple.BezelServices.plist

Deleted the file and restarted the MacBook air and the sound was back!!! I hope this helps you all

a very likely fix:

open a terminal window (final "Terminal" application), and paste in this command, it will fix it:

sudo kill -9 $(ps A | grep coreaudio[a-z] | awk '{print $1}')

basically it kills the coreaudio process in mac and it will automatically restart, then fix the problem.

I am sure it is not hardware.

I had the same problem. No sound and no icon plus the youtube problem and the itunes does not work properly.

I tried everything: deleting these librery/user/preferences files, inserting a wood stick by the earphone hole... nothing happened. But there were something strange: when the system starts up, the icon illuminated and after finishing the start up the icon became grey.

I just rebooted the system and now the volume works.

Could it be a virus that affects the volume wire or something similar?

I fixed it with no changing hardware, then I am sure it is something strange. This is the reason I think it could be a virus.

Thank you very much to all of you

I can confirm that replacing the audio cable has worked for me. Huge relief ;-))

My symptoms (1st gen 1.80GHz 13" MacBook Air) were greyed out loudspeaker icon in the menu bar, no start up chime, no sound at all, no audio hardware showing in System Preferences. I followed the ifixit.com walk-thru, but reseating the cable didn't solve the problem. Replacing the old cable with a used cable bought from eBay.co.uk for GBP30 approx does seem to have worked though.

Fantastic news, as it makes the MBA usable again!!!

Problem solved/fixed!!!

ALL you need to do is just to reinstall the audio cable...

*Symptoms I experienced were the same as above: some videos (of particular format?) plays for up to 3 seconds then pause; audio output not detected, 35mm headphone jack produces no sound either.

And ALL I did was just a push on the audio cable...

*I almost went removing the internal harddrive and start computer to checkout whether it's corruption of OSX (because the hardrive is dying soon too (crashing and requiring 1-hr restoration via Time Machine about twice a month, classic issue of mba too i think)

<Edited by Host>

It was fixed but the problem come again.

If it is an audio cable problem in the Macbook Air as frequent as we can check here, why does not apple fix it by themselves?

It is clear that it is not neither a customer problem for bad use nor a isolated problem. APPLE should react and SOLVE IT.

I bought apple because of the final quality but I think I will come back to windows.... cheaper and they assume their mistakes...

I'm having the same issues. I was given a new macbook air for a birthday gift recently. First it started out as not being able to unmute itself, then after restarting it several times it just randomly cuts out. I'll be taking it in soon and if this is corrected for the long term I will be requesting a new one for the inconvience. Not to mention the amount of money that was spent for a "quailty" machine that can perform simple tasks.

Once you have tried all of the basic things (restart, reset the pram, reset the smc) I had to remove the following preference file.

Delete the BezelServices preferences file – this is a mysteriously magical file. It controls those on-screen images that you see when you change the volume, eject DVDs/CDs, change brightness, etc. But it also seems to be the source of all sorts of odd issues that you can never figure out, and tends to get corrupted. But the fix is easy and relatively safe. Go this preference file (location shown below) and just delete it and reboot. Location &amp; filename:

~Library/Preferences/com.apple.BezelServices.plist

Good luck. This worked on my 13 inch Mac book air 2010 running lion.

My problem seems similar to everyone else's. Just want to confirm, if anyone can help me.

No sound, stopped suddenly, overnight. I woke up, I woke up my MBAir, and no sound. The sound control panel has no input or output options, the earphones do not work, no startup sound, no sound from videos. I ran the hardware test on 'd' startup, said this about audio:

"Intel High Definition Audio:

Audio ID: 0"

I have tried all of the software fixing advice here and elsewhere, started and restarted my Air many times after deleting and doing various things to files and whatever.

So, the thing to do now is install a new cable? That is it? Bit of a problem as I am travelling, but I will have to do that if I need to do that.

Thanks.

Ian,

Different people seem to have "resolved" the problem in different ways, and it is difficult (for me) to understand why - unless the underlying problems are slightly different. However, my problems were precisely the same aas yours. I was not able to sort things out through software / reboots etc, nor did removing the audio cable and re-seating the connectors. But installing a new cable (approx GBP30 on eBay for a "used but functioning" cable does appear to have resolved the problem. (See my earlier post APR-17 above). Using the iFixIt walk through it took ~30 minutes, and only required very basic tools. Good Luck, and I hope you get your MBA working again!