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

I have this problem also. Safe boot and restart seems to cure it for a few hours then it comes back. This morning I was streaming Pandora on my MBA for 30 minutes and then all of a sudden no sound.

This has been going on since October and really is a pain.

We discovered something that may be coincidental or not. As mentioned earlier, every so often on a restart the sound will come back. After a while, the Safari browser will crash and the Air will have to be restarted at which point the sound is gone again. Coincidence? Also,earlier today, all of the icons at the top disappeared (not just the sound icon but also the battery indicator, the signal strength indicator, the time, etc.) but unlike the sound icon disappearing the other functions continued to operate (could still search the web even though there was no signal strength indicator). Coincidence? After a restart the icons came back -- but not the sound or the sound icon.

You're right, the first symptom for me if I'm not listening to sound is Safari starts lagging, beach balling, maybe crashes. When I restart the sound icon is gone. I haven't noticed the other icons disappearing. what seems to fix it every time is to light clean system caches with Main Menu, shut down, safe boot, and restart. Of course this is a lot of trouble.

There is some possibility the sound problem is just a byproduct of whatever is causing the crash.

Same problem here. I went to see the guys at the Genius Bar at the local Applestore. He says it is hardware and wants my computer for an entire week. Not really helpful. After reading this discussion I guess I am better of waiting until someone really finds a solution (apparently exchanging sound cards only is a temporary fix...).

I live in Toronto and I just took in my laptop to an Apple store. The guy told me that he has to order a part, and it would take a few days for the part to come in, and after that they want the laptop back for another 2-3 days (that's what they say...) Either way, it turns out the part that is being replaced is the logicboard. The core of the computer. Okay, guy, whatever you say. It's still weird though that everyone is getting a different solution to this problem. I'm very confused, but hopefully it will get sorted out. I'm still glad I can still keep my laptop while they are waiting for the spare part, though.

I've been having this problem too! And the following got my sound back!

Delete the following file:

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

Restart your computer.

You're all set! Hope it works for you!

My 2008 MacAir sound just went out also and Apple doesnt seem to care or know what the problem is...
Can anyone help? why cant Apple fix this problem. People need to get the word out that these machines are flawed!

Can anyone help?

I agree 100%. Part of the problem is that it's not just happening to the MacBook Air but to other MacBooks as well. I have to believe it's a software issue and I find it strange that there has yet to be a solution. Certainly this same thing should have happened to laptops being used at Apple too.

I own a regular Macbook and this problem happened to me a few weeks ago on election day.

I for one think the entire thing is a software issue, something most likely to do with Flash or an iTunes update. My computer I think has some sort of issue with a faulty sound driver (not sure if that's the correct term for Macs)

Issues:
My computer detects no onboard sound card

Movies are having lagging issues with playback. Flash videos online load, play for 3 seconds, then pause. I need to keep jumping to continue the movie. Quicktime / iTunes movies have significant lagtime when trying to play, stop, or skip a movie (and this has NEVER happened before)

International "No" symbol when trying to adjust the volume from the keyboard, missing volume graphic on the finder bar (though the space for it is still there).

Music through iTunes will not play, period.

I'd assume with this happening to so many people, that by now Apple would have a growing awareness of the problem. Guys at the Apple store try to run a system update, find nothing, then say they want to "hold onto the computer" for a few days. As a student, I can't afford to give up my laptop, even for a few days, at least until the semester is over. So now I'm stuck using a computer with no sound / media playback that (at least otherwise) functions normally.


In theory, I have something that I want to try, to see if it's a hardware or software issue: (you need two Macbooks + a Firewire-Firewire connecting cable.)

1) Boot your Macbook in Firewire target disk mode - Hold "T"at startup - this allows you to plug your computer into another computer as a recognizable "hard drive"

2) Connect the two computers (yours in disk mode, the other off) together with a Firewire-Firewire cable, and

3) Boot the other Macbook and hold Option-Command-Shift-Delete, this should Bypass the primary startup volume and seek a different startup volume (such as a CD or external disk)

4) Select your original, now connected, target hard drive to boot from.

In theory, I should be able to run my software off of the other computer's hardware. If there is sound on the other computer, it's a hardware issue on your computer. If there's no sound still, it's a software issue, and it's a bigger problem for you.

At some point i'll try it when I get my hands on a connector cable. If anyone is willing to try it before hand, let me know how it goes.

I just got the same audio problem. I've tried everything suggested, such as reset PRAM, clear audio cache, etc. Nothing seems to help.

I read somewhere that it may be the audio cable connecting the speaker to the logic board that is defective.

Did anyone have a fix for this sound problem, or do I have to take my MacBook Air to the Apple store to fix it?

I would like to re-state one element of this mystery that I still think might be useful -- the connection to Apple TV. My remote always affects the Air as well as the TV, even when the Air is put to sleep and across the room. I can see the flashing even with the lid closed. Of course I've tried and tried to marry the remote to the TV, with no luck.

The sound icon still appears on the laptop screen if it's open, and basically there is havoc on the Air that I have to cure by using the escape key several times. This doesn't seem right.

I do plan on taking the machine in for service as soon as I can, and will report what they tell me, but losing the sound and all video playback just *****.

Apple gave me a new MBA which fixed my problem. Details follow...

In October I started having the no output device found message and could fix by cleaning system caches. This was a pain and would fix the problem briefly but it returned. Finally about two weeks ago I couldn't make the no output devices message go away at all and had no sound permanently.

I took my 1.6 80GB MBA to the local apple store and the genius booted it from the external drive he keeps at the bar and the MBA still had no sound. That meant it was clearly hardware, not software. They kept if for a little over a week, and when I went back they had me a new MBA just like I had given them and had even restored my user data to the new MBA.

I have no problem now! It's a nice machine. Looks like the AppleCare warranty was worth the money.

Ralph

Same thing for me. Just happened today. I have a MacBook Air 1.6GHz 80GB HD.

"Up-Sound" and "Down-Sound" keys produces an image with a "not-working" symbol.

"System Preferences >> Sound" shows no sound output or input devices.

Running "GarageBand" shows an error:
Selected Driver not found.
(-10202)

Looks like my sound hardware disappeared.

Didn't see a good solution on this thread.

Need help.

My problem was clearly hardware since it existed even when my MBA was booted from a different external drive at the genius bar. But you have a good point, the problem can be caused by a number of issues and third party software could be one of them. ralph

I used my Mac mini as the Remote Disc and I booted my MBA from the install disc, it didn't give me sound too. However, I think I fixed it by putting the computer to sleep from the Apple menu (instead of closing the MBA lid) and then waked it up and then restarted it.

It works quite good if I don't have VMWare running and just running Safari and Adium. Maybe it is not related to VMWare and only related to memory issues.