27inch ACD Sound Issues

Haven't had that experience, but one time I saw the backlight kind of get a little dim for a brief second during a heavy bass note on a particular song while I had the volume turned up. I didn't see it happen again after I tried it again though. I suspect it was related to power draw or something.

I have been having the same issue with my 27" ACD, it seems to be related to allowing the computer to go to sleep, if I don't allow my computer to sleep it is fine, once I turn on power management I loose the sound once it sleeps. You can unplug the monitor power for 10 seconds and it will reset and work until the next time it sleeps. The ultimate fix will be a software update from Apple, we should all contact Apple to make sure they are working on a fix.

USB Audio quits working after awhile.

Resetting the SMC brings it back every time.

So I would guess it is a software issue that can be fixed in a firmware update.

I just started experiencing the same problem with my two week old 27" ACD.

It did it again today, I noticed that the USB ports work fine, but the iSight, Speakers, and Mic quit working on the display. SMC reset and everything was fine.

I really believe it is a software issue and can be fixed by Apple.

I have had this issue twice now with my 27 ACD. Rebooting my macbook did not resolve the issue. I had to physically unplug the monitor and wait a few moments before plugging back in.

I just got off the phone with support and they had me load the 27" software update Again! And told me to call back if it continues. If you are having this issue please call Apple so it will get some visibility. I told him there are threads going in this forum and one on the Apple Support website with the same issue but they need to hear from us. He gave me a case number to call back on because I told him I will be calling every time it happens.

Dont know about you guys but I expect the sound to work all the time on a $1000.00 monitor!

He had me go to http://support.apple.com/kb/dl1107 and downloaded it. I had already loaded it once through Software Update so I am not sure what the difference is but I will try anything.

mictons said:

He had me go to http://support.apple.com/kb/dl1107 and downloaded it. I had already loaded it once through Software Update so I am not sure what the difference is but I will try anything.

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How do you reload it? I get the message my computer doesn't need it.

Thank you.

I just downloaded the file and ran it, I didn't have any problems.

Everything works like it did before I reloaded the update including the problem, I am getting ready to call Apple right now because I have no audio once again.

No luck here. I'm up to 4 occurrences of this problem in one week of 27" ACD ownership. Quite frustrating. Each time it has happened, Ive been too busy to call Apple. Hopefully I'll have time next time it occurs.

I call them they have me reset the SMC.

Right now everything has stopped working except the USB ports. I would call them again but they will have me reset the SMC again, and again, and again.

Hopefully Apple has a fix on the way. I see zero point in returning the display since this is a common problem that Apple will have to address with a firmware/software update soon.

Does anyone have the issue where there is a delay in hearing the up/down volume sound when going up or down in volume? The "boing" sound is a little late after hitting the button. My 24" LED doesn't have this problem, only the 27".

I have called in 4 times now and every time I call they run me through the usual script, check this, reset that, blablabla. They did elevate my issue to a "SENIOR" engineer the last time I called and he is doing some research on the issue so we "are" getting some visibility with Apple now. He is supposed to contact me today or tomorrow with an answer.

There is a chance this is a hardware issue, every time I call in they check there database and do not have a large number of calls with this problem. If you look at this thread there are only a few of us experiencing the problem so based on how may units they have sold we are a very small minority. They are looking at replacing my unit because I told them I would return it to the Apple store if the issue it is not addressed. I will let you know when I hear back from them.

I just purchased one this past weekend and noticed the sound stops working after my MBP goes to sleep. When I wake it back up the sound has stopped working but if I unplug the ACD for a few seconds and plug it back in the sound comes back. I have a call into Apple but I'm thinking it may be something to do with the USB after sleeping.