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

hi guys -

fixed the problem with the audio cable as well! great detective work by all

I echo Phil's take-apart advice above and will add one additional item. Be very careful when removing the screws as they can strip easily. Your whole repair job will go away if you strip a Phillips head.

I also ordered the cable from AppleComponents - came in 4 days and worked excellently.

one piece of addnl info - my audio initially had crapped out in Feb 09 on my one year purchase anniversary.

Under warranty, Apple took a look and were dumbfounded and eventually concluded the audio cable was "loose". they never replaced it but apparently seated it. This did not work for me on this occurrence, and I needed a new cable. But I knew where to start looking (cable!) and this thread was very helpful...

Hi all,
Today my sound cut out:( No videos or anything which is reall sad because I had a three hour drive home and I would have loved to watch a movie or two. Just wondering if fixing the cable is a permanet fix. I've had my laptop for about 14 months and i'va had to have the screen replaced twice and I'm out of my warranty for about a month because last month or 2 months ago I had to have my screen fixed and then I was a week out of my warranty but I got it all good. So i wa just wondering if it's the cable thats the problem for everyone or if it's possible it's a software issue because my friend kees telling me it's a software issue so I am going to upgrade to Snow Leopard in a few minutes when I finish backing up and we'll see but from what I've read I think it's the cable

I have the same problem with my mba. My MBA is still in warranty. I sent it to genius bar and they kept it for 4 days. Then they told me that I still need to wait for another week to get it back because they need to change the logic board and they have no part on the site. So it needs to be shipped to company and then ship back.
I can't wait for so long time. So I take it back, but without sound is too much inconvenient.
I tried every methods mentioned in this thread except opening back. Nothing works.
Any other advice is appreciated.

I had the same issue before. Before, I installed a program called SoundFlower, because I am a DJ. It hijacks your computer's audio, and plays it in an output. What I did, was System Preferences -> Sound -> Output. Then I made sure that the output was highlighted on built in internal speakers.

It worked for me!

I have first gen MBA, 17 months old and sound just disappeared. However I can alter sound preferences so the sound card seems to be connected but there is no sound in either headphones or speakers.

I have upgraded to snow leopard and the other day I installed rosetta in order to be able to play sim city 4. After a few hrs of gaming the game crashed and since then the sound has come and gone. Rebooting helped in the beginning but now it's totally gone. Could rosetta cause this or is it the opposite? That the application crashed because of failing sound device?

Same pb here: no audio on macbook air after 11 month. At the beginning it was an intermittent problem, so I suspected a software bug. It turned out that it was hardware: audio cable have been replaced and it works fine now.

Since you still have warranty I'd recommend you to take it to an apple repair partner.

The way you describe the problem sounds very much like it's the HW and I'm 95% sure that it's the flex-cable that has given up.

To be extra sure about the HW failing you can always make a backup with time machine and clean install your MBA. If turns out not to be the SW just restore the backup and everything is back to normal again.

Good Luck!

Yap,

Was the same for me. Had SL installed for about a week when it broke down. But I believe it's more about the quality of the flex-cable. My MBA is about 18 months old and I'm guessing your is about the same.

Please get back to this thread when you've talked to the Genius. Would be interesting to get their opinion on this problem.

Sound has gone again!
Zapped PRAM and cleared audio caches. It definitely smells like a hardware problem.
Will report again after my visit to the Genius folk in a couple of days. Got my Air on the week of release some 18 months or so back.

My MBA just lost its audio...it came back after a restart. I wonder how long I have until it totally fails... To all of you who had it repaired out of warranty: keep the receipt. If Apple acknowledges this problem as being related to a manufacturing defect, you might get reimbursed. Hopefully, enough of us will report the issue.

The sound on my 18-month old MBA failed completely earlier today -- no audio from the built-in speakers, no audio from the headset jack. Prior to the failure, I noticed intermittent sound on some videos, then the videos stopped playing (although they were loading). I tested audio from a DVD and the DVD software quit repeatedly, then operated with no sound and video stopping or running irregularly. The icon for sound is still at the top of my screen, but when I go to system preferences, there is only my Bluetooth headset which is also has no sound. The other audio options (built-in and headset) are no longer available. iTunes loads, but does not play.

Reading the posts hasn't been encouraging. It seems odd to me that a hardware failure would cause this set of apparently interrelated problems.

One additional note. I have a 30GB iPod 5th Generation which had a complete sound failure, too. In this case it was apparently a problem with a chip that was failing after about 12-18 months -- it required the replacement of the entire unit.

I guess I am headed to the Apple repair office in Seoul, but I must say I am thinking seriously that maybe Apple's fine design and excellent OS are not accompanied by quality manufacturing. At the high prices, that would seem a necessity.

Hi All, I am now going thru this long thread hoping to find an answer.

A few days ago, on my MacBook Air, I also suddenly lost sound and in the preferences it now indicates "no audio output device".

I HIGHLY suspect Snow Leapord as I just did an install of it, and update 10.6.1.

I have already tried:

1. Apple Hardware Test via my optical drive, "d", and no problem found
2. Booting up in Safe-Boot
3. Reseting the Pram via option-command-p-r
4. Reinstalling Snow Leopard to now be on 10.6.0
5. Removing all previous Bluetooth sound devices
6. Plugging in and unplugging a headphone in my one audio socket

By the way, I also upgraded my iTunes to 9.0, which I also suspect. Right now I can select a song, hit play, and it doesn't play.

I would LOVE TO CALL APPLE tech support as my Snow Leopard is under warranty for 90 days, but I exclusively use Skype and guess what NO SOUND!!!! It's almost idiotic there is no other way to contact Apple Tech support. Do you "hear" that Apple support, so people do not have phones!!!!! Hellloo.

Thanks all for any ideas.

There seem to be one or more problems and one or more fixes.

Fixes:
1. replace sound cable
2. delete some preferences (only fixed a couple machines)

Although I know for many here opening up the case is not a lot of trouble or intimidating, it is for me. I'm still wondering if there is a software glitch.

For example, why would a non-working sound card cable now cause my Skype to crash?

Apologies for the long text below:

Process: Skype [200]
Path: /Applications/Skype.app/Contents/MacOS/Skype
Identifier: com.skype.skype
Version: 2.8.0.722 (2.8.0.722)
Code Type: X86 (Native)
Parent Process: launchd [139]

Date/Time: 2009-10-09 11:01:38.578 +0800
OS Version: Mac OS X 10.6 (10A432)
Report Version: 6

Interval Since Last Report: 12274 sec
Crashes Since Last Report: 1
Per-App Interval Since Last Report: 8860 sec
Per-App Crashes Since Last Report: 1
Anonymous UUID: B148CC67-2094-4CBF-BEB1-2867E4AD3BB5

Exception Type: EXC_CRASH (SIGABRT)
Exception Codes: 0x0000000000000000, 0x0000000000000000
Crashed Thread: 4

Application Specific Information:
abort() called

Thread 0: Dispatch queue: com.apple.main-thread
0 libSystem.B.dylib 0x0202f942 semaphore wait_signaltrap + 10
1 libSystem.B.dylib 0x02035406 pthread mutexlock + 490
2 com.skype.skype 0x002e1366 0x1000 + 3015526
3 com.skype.skype 0x00b4e046 0x1000 + 11849798
4 com.skype.skype 0x0047f530 0x1000 + 4711728
5 ??? 0x8910245c 0 + 2299536476

Thread 1: Dispatch queue: com.apple.libdispatch-manager
0 libSystem.B.dylib 0x0205610a kevent + 10
1 libSystem.B.dylib 0x02056824 dispatch_mgrinvoke + 215
2 libSystem.B.dylib 0x02055ce1 dispatch_queueinvoke + 163
3 libSystem.B.dylib 0x02055a86 dispatch_workerthread2 + 234
4 libSystem.B.dylib 0x02055511 pthreadwqthread + 390
5 libSystem.B.dylib 0x02055356 start_wqthread + 30

Thread 2:
0 libSystem.B.dylib 0x0205d82a _semwaitsignal + 10
1 libSystem.B.dylib 0x02089681 nanosleep$UNIX2003 + 188
2 com.apple.Foundation 0x0333e9e0 +[NSThread sleepUntilDate:] + 147
3 com.skype.skype 0x000978d9 0x1000 + 616665
4 com.apple.Foundation 0x03316964 -[NSThread main] + 45
5 com.apple.Foundation 0x03316914 _NSThread__main_ + 1499
6 libSystem.B.dylib 0x0205cfe1 pthreadstart + 345
7 libSystem.B.dylib 0x0205ce66 thread_start + 34

Thread 3:
0 libSystem.B.dylib 0x0202f95a semaphore timedwait_signaltrap + 10
1 libSystem.B.dylib 0x0205d469 pthread_condwait + 1066
2 libSystem.B.dylib 0x020a6950 pthread condtimedwait + 47
3 com.skype.skype 0x002e1206 0x1000 + 3015174

Thread 4 Crashed:
0 libSystem.B.dylib 0x0209cc8e _semwait_signalnocancel + 10
1 libSystem.B.dylib 0x0209cb72 nanosleep$NOCANCEL$UNIX2003 + 166
2 libSystem.B.dylib 0x021185b2 usleep$NOCANCEL$UNIX2003 + 61
3 libSystem.B.dylib 0x02139c68 abort + 105
4 com.skype.skype 0x00230f3f 0x1000 + 2293567
5 ??? 0xffffffff 0 + 4294967295
6 com.skype.skype 0x0089cf5e 0x1000 + 9027422
7 com.skype.skype 0x0090f7fd 0x1000 + 9496573
8 com.skype.skype 0x0091ca69 0x1000 + 9550441
9 com.skype.skype 0x0091cccb 0x1000 + 9551051
10 com.skype.skype 0x0033ad8f 0x1000 + 3382671

Thread 5:
0 libSystem.B.dylib 0x0202f942 semaphore wait_signaltrap + 10
1 libSystem.B.dylib 0x0205d480 pthread_condwait + 1089
2 libSystem.B.dylib 0x020a6743 pthread condwait + 48
3 com.skype.skype 0x002e1260 0x1000 + 3015264

Thread 6:
0 libSystem.B.dylib 0x020f6dd2 poll + 10
1 com.skype.skype 0x002da3ad 0x1000 + 2986925
2 com.skype.skype 0x002e4d32 0x1000 + 3030322
3 com.skype.skype 0x002d1dbc 0x1000 + 2952636
4 com.skype.skype 0x002e1c19 0x1000 + 3017753
5 libSystem.B.dylib 0x0205cfe1 pthreadstart + 345
6 libSystem.B.dylib 0x0205ce66 thread_start + 34

Thread 7:
0 libSystem.B.dylib 0x0202f8fa mach msgtrap + 10
1 libSystem.B.dylib 0x02030067 mach_msg + 68
2 com.apple.CoreFoundation 0x02359dbf __CFRunLoopRun + 2447
3 com.apple.CoreFoundation 0x02358d34 CFRunLoopRunSpecific + 452
4 com.apple.CoreFoundation 0x0235e7a4 CFRunLoopRun + 84
5 com.skype.skype 0x00233995 0x1000 + 2304405
6 com.skype.skype 0x002e1c19 0x1000 + 3017753
7 libSystem.B.dylib 0x0205cfe1 pthreadstart + 345
8 libSystem.B.dylib 0x0205ce66 thread_start + 34

Thread 8:
0 libSystem.B.dylib 0x0202f942 semaphore wait_signaltrap + 10
1 libSystem.B.dylib 0x0205d480 pthread_condwait + 1089
2 libSystem.B.dylib 0x020a6743 pthread condwait + 48
3 com.skype.skype 0x002e1260 0x1000 + 3015264

Thread 9:
0 libSystem.B.dylib 0x0202f8fa mach msgtrap + 10
1 libSystem.B.dylib 0x02030067 mach_msg + 68
2 com.apple.CoreFoundation 0x02359dbf __CFRunLoopRun + 2447
3 com.apple.CoreFoundation 0x02358d34 CFRunLoopRunSpecific + 452
4 com.apple.CoreFoundation 0x0235e7a4 CFRunLoopRun + 84
5 com.skype.skype 0x00320e9f 0x1000 + 3276447
6 com.skype.skype 0x002e1c19 0x1000 + 3017753
7 libSystem.B.dylib 0x0205cfe1 pthreadstart + 345
8 libSystem.B.dylib 0x0205ce66 thread_start + 34

Thread 10:
0 libSystem.B.dylib 0x0202f942 semaphore wait_signaltrap + 10
1 libSystem.B.dylib 0x0205d480 pthread_condwait + 1089
2 libSystem.B.dylib 0x020a6743 pthread condwait + 48
3 com.skype.skype 0x002e1260 0x1000 + 3015264

Thread 11:
0 libSystem.B.dylib 0x0202f942 semaphore wait_signaltrap + 10
1 libSystem.B.dylib 0x02035406 pthread mutexlock + 490
2 com.skype.skype 0x002e1366 0x1000 + 3015526

Thread 12:
0 libSystem.B.dylib 0x0202f942 semaphore wait_signaltrap + 10
1 libSystem.B.dylib 0x02035406 pthread mutexlock + 490
2 com.skype.skype 0x002e1366 0x1000 + 3015526

Thread 13:
0 libSystem.B.dylib 0x0202f942 semaphore wait_signaltrap + 10
1 libSystem.B.dylib 0x0205d480 pthread_condwait + 1089
2 libSystem.B.dylib 0x020a6743 pthread condwait + 48
3 com.skype.skype 0x002e1260 0x1000 + 3015264

Thread 14:
0 libSystem.B.dylib 0x0202f8fa mach msgtrap + 10
1 libSystem.B.dylib 0x02030067 mach_msg + 68
2 com.apple.CoreFoundation 0x02359dbf __CFRunLoopRun + 2447
3 com.apple.CoreFoundation 0x02358d34 CFRunLoopRunSpecific + 452
4 com.apple.CoreFoundation 0x02358b61 CFRunLoopRunInMode + 97
5 com.apple.Foundation 0x0334f498 +[NSURLConnection(NSURLConnectionReallyInternal) _resourceLoadLoop:] + 329
6 com.apple.Foundation 0x03316964 -[NSThread main] + 45
7 com.apple.Foundation 0x03316914 _NSThread__main_ + 1499
8 libSystem.B.dylib 0x0205cfe1 pthreadstart + 345
9 libSystem.B.dylib 0x0205ce66 thread_start + 34

Thread 15:
0 libSystem.B.dylib 0x0204e876 select$DARWIN_EXTSN + 10
1 com.apple.CoreFoundation 0x0239904d __CFSocketManager + 1085
2 libSystem.B.dylib 0x0205cfe1 pthreadstart + 345
3 libSystem.B.dylib 0x0205ce66 thread_start + 34

Thread 16:
0 libSystem.B.dylib 0x020551a2 _workqkernreturn + 10
1 libSystem.B.dylib 0x02055738 pthreadwqthread + 941
2 libSystem.B.dylib 0x02055356 start_wqthread + 30

Thread 17:
0 libSystem.B.dylib 0x020551a2 _workqkernreturn + 10
1 libSystem.B.dylib 0x02055738 pthreadwqthread + 941
2 libSystem.B.dylib 0x02055356 start_wqthread + 30

Thread 18:
0 libSystem.B.dylib 0x020551a2 _workqkernreturn + 10
1 libSystem.B.dylib 0x02055738 pthreadwqthread + 941
2 libSystem.B.dylib 0x02055356 start_wqthread + 30

Thread 19:
0 libSystem.B.dylib 0x020551a2 _workqkernreturn + 10
1 libSystem.B.dylib 0x02055738 pthreadwqthread + 941
2 libSystem.B.dylib 0x02055356 start_wqthread + 30

Thread 20:
0 libSystem.B.dylib 0x0202fa0e mach waituntil + 10
1 libSystem.B.dylib 0x020b7c05 nanosleep + 345
2 com.skype.skype 0x0089b124 0x1000 + 9019684
3 com.skype.skype 0x008c9af3 0x1000 + 9210611
4 com.skype.skype 0x0089b152 0x1000 + 9019730
5 libSystem.B.dylib 0x0205cfe1 pthreadstart + 345
6 libSystem.B.dylib 0x0205ce66 thread_start + 34

Thread 21:
0 libSystem.B.dylib 0x0202fa0e mach waituntil + 10
1 libSystem.B.dylib 0x020b7c05 nanosleep + 345
2 com.skype.skype 0x0089b124 0x1000 + 9019684
3 com.skype.skype 0x0088c60c 0x1000 + 8959500
4 com.skype.skype 0x0089b152 0x1000 + 9019730
5 libSystem.B.dylib 0x0205cfe1 pthreadstart + 345
6 libSystem.B.dylib 0x0205ce66 thread_start + 34

Thread 4 crashed with X86 Thread State (32-bit):
eax: 0x0000003c ebx: 0x0209cad9 ecx: 0xb028821c edx: 0x0209cc8e
edi: 0x09c3adac esi: 0xb0288278 ebp: 0xb0288258 esp: 0xb028821c
ss: 0x0000001f efl: 0x00000247 eip: 0x0209cc8e cs: 0x00000007
ds: 0x0000001f es: 0x0000001f fs: 0x00000000 gs: 0x00000037
cr2: 0xb29c0fec

Binary Images:
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0x9a99000 - 0x9acaff3 libTrueTypeScaler.dylib ??? (???) <F326E053-7425-2F10-F883-CBD56A1E1B72> /System/Library/Frameworks/ApplicationServices.framework/Frameworks/ATS.framewo rk/Resources/libTrueTypeScaler.dylib
0x9add000 - 0x9ae1ff3 com.apple.audio.AudioIPCPlugIn 1.1.0 (1.1.0) <39CD9296-183C-5603-94A4-0A0EC327BA69> /System/Library/Extensions/AudioIPCDriver.kext/Contents/Resources/AudioIPCPlugI n.bundle/Contents/MacOS/AudioIPCPlugIn
0x9ae6000 - 0x9ae7ff7 +com.skype.TigerAndLaterOnly ??? (1.0) <85F03BA7-B5B7-ABDD-FFDD-D2833349E161> /Applications/Skype.app/Contents/Resources/TigerAndLaterOnly.bundle/Contents/Ma cOS/TigerAndLaterOnly
0x9aec000 - 0x9af9ff7 libbz2.1.0.dylib ??? (???) <495732E1-2AC4-44FC-E633-4CBCC503B924> /usr/lib/libbz2.1.0.dylib
0x9f40000 - 0x9f7afe7 libFontRegistry.dylib ??? (???) <EE633CF6-8827-EF05-10A4-5F2937120227> /System/Library/Frameworks/ApplicationServices.framework/Frameworks/ATS.framewo rk/Resources/libFontRegistry.dylib
0x1bd59000 - 0x1bf6bfff com.apple.RawCamera.bundle 2.2.1 (477) <10937A0D-0856-1B69-AE27-43BC15B7DD21> /System/Library/CoreServices/RawCamera.bundle/Contents/MacOS/RawCamera
0x1c02c000 - 0x1c067fe7 com.apple.DebugSymbols 1.1 (70) <05013716-CFCF-801E-5535-D0643869BDCD> /System/Library/PrivateFrameworks/DebugSymbols.framework/Versions/A/DebugSymbol s
0x1d94d000 - 0x1da8dff7 com.apple.syncservices 5.0 (575) <61B36E07-6D14-97DC-122F-41EDE1F6DB03> /System/Library/Frameworks/SyncServices.framework/Versions/A/SyncServices
0x1db04000 - 0x1db54ff7 com.apple.Symbolication 1.1 (67) <E0C94D8B-4F12-49E6-BAA5-3B00441A047B> /System/Library/PrivateFrameworks/Symbolication.framework/Versions/A/Symbolicat ion
0x1db76000 - 0x1dbeafef com.apple.CoreSymbolication 2.0 (23) <8A04EA5F-83F8-5E15-B2E0-8A727C9C4E8B> /System/Library/PrivateFrameworks/CoreSymbolication.framework/Versions/A/CoreSy mbolication
0x1df3b000 - 0x1df7cff7 libRIP.A.dylib ??? (???) <6DB158C6-A84D-98C9-1D48-868A3DB17D09> /System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks/ CoreGraphics.framework/Versions/A/Resources/libRIP.A.dylib
0x1e8a5000 - 0x1e8afff7 com.apple.IOFWDVComponents 1.9.9 (1.9.9) <5B4E7BD7-EF5A-2F5C-DF8E-3D4A7B59F779> /System/Library/Components/IOFWDVComponents.component/Contents/MacOS/IOFWDVComp onents
0x1e8b9000 - 0x1e8c0ff7 com.apple.agl 3.0.12 (AGL-3.0.12) <6BF89127-C18C-27A9-F94A-981836A822FE> /System/Library/Frameworks/AGL.framework/Versions/A/AGL
0x1e906000 - 0x1e92dfe7 +com.google.talk.camera 1.0.15.1351 (1.0.15.1351) <D7D272CF-AE65-922B-E807-4959939C13B3> /Library/Components/Google Camera Adapter 0.component/Contents/MacOS/Google Camera Adapter 0
0x1e943000 - 0x1e96afe7 +com.google.talk.camera 1.0.15.1351 (1.0.15.1351) <DAFDD331-C7C5-02D2-A703-990AAB84D5ED> /Library/Components/Google Camera Adapter 1.component/Contents/MacOS/Google Camera Adapter 1
0x1e980000 - 0x1e9bcfe3 com.apple.QuickTimeFireWireDV.component 7.6.3 (1584) <8E3D38A3-1005-305C-7B70-D400AB4AC0F3> /System/Library/QuickTime/QuickTimeFireWireDV.component/Contents/MacOS/QuickTim eFireWireDV
0x1e9c8000 - 0x1e9f2ffb com.apple.QuickTimeIIDCDigitizer 7.6.3 (1584) <73B2D191-434A-BF2D-046F-8C4E84113637> /System/Library/QuickTime/QuickTimeIIDCDigitizer.component/Contents/MacOS/Quick TimeIIDCDigitizer
0x1e9fa000 - 0x1ea47fe7 com.apple.QuickTimeUSBVDCDigitizer 2.5.0 (2.5.0) <51957545-8A73-C3D7-2F27-C5DA2A0523BC> /System/Library/QuickTime/QuickTimeUSBVDCDigitizer.component/Contents/MacOS/Qui ckTimeUSBVDCDigitizer
0x1ea52000 - 0x1ebc3ff7 GLEngine ??? (???) <132E6F18-BD3F-53AC-8448-2B68A83B0393> /System/Library/Frameworks/OpenGL.framework/Resources/GLEngine.bundle/GLEngine
0x1ebf4000 - 0x1f05cfef com.apple.driver.AppleIntelGMAX3100GLDriver 1.6.0 (6.0.0) <4EC98261-1643-E0D8-69FB-7227FA9C6FC2> /System/Library/Extensions/AppleIntelGMAX3100GLDriver.bundle/Contents/MacOS/App leIntelGMAX3100GLDriver
0x1f268000 - 0x1f284ff7 GLRendererFloat ??? (???) <FE1D4967-5C89-4C0F-FA40-5AF1EB1A742D> /System/Library/Frameworks/OpenGL.framework/Resources/GLRendererFloat.bundle/GL RendererFloat
0x1f500000 - 0x1f506ff7 libCGXCoreImage.A.dylib ??? (???) <8E11578A-B46D-0BC1-DE50-05A92F377D7D> /System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks/ CoreGraphics.framework/Versions/A/Resources/libCGXCoreImage.A.dylib
0x1f55e000 - 0x1f563ff7 com.apple.AddressBook.LDAPSource 1.0 (862) <7FD3E8BB-8FC9-7E5C-E753-185B1FC0DA39> /System/Library/Address Book Plug-Ins/LDAP.sourcebundle/Contents/MacOS/LDAP
0x1f5ae000 - 0x1f67fff3 ColorSyncDeprecated.dylib ??? (???) <AFD6DAC8-12EF-B2A0-5322-E902D5B48B0A> /System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks/ ColorSync.framework/Versions/A/Resources/ColorSyncDeprecated.dylib
0x1fc11000 - 0x1fc14ff7 com.apple.yahoo.syncframework 1.3 (51) <786BD4EB-E607-9ADD-E885-340593C8898A> /System/Library/PrivateFrameworks/YahooSync.framework/Versions/A/YahooSync
0x1fc1a000 - 0x1fc1fff7 com.apple.AOSNotification 1.1.0 (123.3) <0386E48C-4095-1D2A-629A-83B7711550F3> /System/Library/PrivateFrameworks/AOSNotification.framework/Versions/A/AOSNotif ication
0x1ffc4000 - 0x1ffd5ff7 com.apple.AddressBook.LocalSourceBundle 1.0 (862) <FCA4561A-EC92-FC0C-3ED7-9AE854535925> /System/Library/Address Book Plug-Ins/LocalSource.sourcebundle/Contents/MacOS/LocalSource
0x1ffdd000 - 0x1ffefff7 com.apple.syncservices.syncservicesui 5.0 (575) <30009CB4-91E6-5006-3FA5-606C54A1EA7A> /System/Library/PrivateFrameworks/SyncServicesUI.framework/Versions/A/SyncServi cesUI
0x20000000 - 0x20098fe7 edu.mit.Kerberos 6.5.8 (6.5.8) <BA9BD282-FF56-3BFD-E78C-7DBE73B48480> /System/Library/Frameworks/Kerberos.framework/Versions/A/Kerberos
0x26a3f000 - 0x26a8dff7 com.apple.google.GoogleContactSyncFramework 39 (39) <63E3292C-8700-CBED-8447-035E9AB4B1A3> /System/Library/PrivateFrameworks/GoogleContactSync.framework/Versions/A/Google ContactSync
0x26aad000 - 0x26acafe7 com.apple.DotMacSyncManager 2.0.0 (446) <4F2093CF-02E6-470C-038C-801F548475F0> /System/Library/PrivateFrameworks/DotMacSyncManager.framework/Versions/A/DotMac SyncManager
0x26c00000 - 0x26c6eff7 com.apple.ISSupport 1.9.1 (49) <E6EF2734-ED63-E7C2-C4D2-8D64E9955BFC> /System/Library/PrivateFrameworks/ISSupport.framework/Versions/A/ISSupport
0x4beef000 - 0x4bef9ff7 com.apple.dotMacLegacy 3.2 (266) <6F2588BA-E801-1664-E60C-5BEC2AF924D0> /System/Library/PrivateFrameworks/DotMacLegacy.framework/Versions/A/DotMacLegac y
0x64b00000 - 0x64b07fff com.apple.print.framework.Print 6.0 (237) <7A06B15C-B835-096E-7D96-C2FE8F0D21E1> /System/Library/Frameworks/Carbon.framework/Versions/A/Frameworks/Print.framewo rk/Versions/A/Print
0x70000000 - 0x700cbfe7 com.apple.audio.units.Components 1.6 (1.6) <A568FC6D-1D2D-A04B-FD1A-AFF6E326E020> /System/Library/Components/CoreAudio.component/Contents/MacOS/CoreAudio
0x8fe00000 - 0x8fe4162b dyld 132.1 (???) <211AF0DD-42D9-79C8-BB6A-1F4BEEF4B4AB> /usr/lib/dyld
0xc0000000 - 0xc0008fff +com.growl.growlframework 0.7.6 (0.7.6) /Applications/Skype.app/Contents/Frameworks/Growl.framework/Versions/A/Growl
0xd0000000 - 0xd0003ff4 +com.skype.skypeframework ??? (2.8.0.620) <351111CC-CD63-04AD-6643-B89B9399DFDD> /Applications/Skype.app/Contents/Frameworks/Skype.framework/Versions/A/Skype
0xfa100000 - 0xfa191fe3 com.apple.print.framework.PrintCore 6.0 (312) <C588530A-0F2C-DD72-E308-3B8735125189> /System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks/ PrintCore.framework/Versions/A/PrintCore
0xffff0000 - 0xffff1fff libSystem.B.dylib ??? (???) <068CC3F2-F867-A231-A16C-CC01C29A9816> /usr/lib/libSystem.B.dylib

Model: MacBookAir1,1, BootROM MBA11.00BB.B03, 2 processors, Intel Core 2 Duo, 1.6 GHz, 2 GB, SMC 1.23f20
Graphics: Intel GMA X3100, GMA X3100, Built-In, 144 MB
Memory Module: global_name
AirPort: spairport wireless_card_type_airportextreme (0x14E4, 0x8B), Broadcom BCM43xx 1.0 (5.10.91.19)
Bluetooth: Version 2.2.0f18, 2 service, 1 devices, 1 incoming serial ports
Network Service: AirPort, AirPort, en0
Parallel ATA Device: SAMSUNG HS082HB, 74.53 GB
USB Device: Built-in iSight, 0x05ac (Apple Inc.), 0x8505, 0xfd400000
USB Device: Macbook Air SuperDrive, 0x05ac (Apple Inc.), 0x1500, 0xfd100000
USB Device: Apple Internal Keyboard / Trackpad, 0x05ac (Apple Inc.), 0x0223, 0x5d200000
USB Device: IR Receiver, 0x05ac (Apple Inc.), 0x8242, 0x5d100000
USB Device: BRCM2046 Hub, 0x0a5c (Broadcom Corp.), 0x4500, 0x1d200000
USB Device: Bluetooth USB Host Controller, 0x05ac (Apple Inc.), 0x8210, 0x1d210000

Mine just died aswell. Same loss of input and output devices. Sound still works with a USB device (Mbox2). Same mysterious disappearance of info in the System Profiler Audio(Built In). Same treatments failed (reinstalling 10.6.0, resetting PRAM and SMC). This is completely rubbish in a high end laptop. Anyone taking bets on this being fixed in 10.6.2, or a hardware recall?

Hmm , I wonder if nuking the drive and installing Windows 7 might fix it 🙂

I just got it too! MacBook Air with 10.5.8. No sound driver found (when it was working fine lastnight until it crashed! So I applied updates (from 10.5.6 through 10.5.8) and on restarts, sometimes the restarts hung a bit and the sound worked randomly through the updates. But, now there is no sound!!! Please help Apple; you're our only hope!