My imac keeps muting itself

[ssahay123]

Need help with this annoying problem... while working, my imac suddenly mutes itself and the big mute icon comes up on the screen. I am able to unmute by pressing the increase sound button on the keyboard. However, after a while, it mutes itself again.
Can someone please help.... Thanks, Sumit

 

[WilliamG]

Are you hitting the mute button?

 

[OLDCODGER]

Will it work on a wife?

 

[Ripmax2000]

You might have another keyboard paired to it that you're not aware of, make sure of that it Bluetooth preferences.

Turn of IR remote in security preferences.

You might have a faulty keyboard, try using it with another computer if you have one, see if the issue happens on that one too.

You could also go into keyboard preferences and select "Use F1 F2 etc keys as standard function keys" and see if something else (like expose) happens instead - just as a test.

If its none of those, then it's probably some software on your machine making it happen.

 

[Ecoh]

Have you tried the NVRAM reset boot ? It can fix problems with speaker volume.

Press Option-Command-P-R until you hear startup sound a second time.

http://support.apple.com/kb/HT1379
Shut down your Mac.
Locate the following keys on the keyboard: Command (⌘), Option, P, and R. You will need to hold these keys down simultaneously in step 4.
Turn on the computer.
Press and hold the Command-Option-P-R keys before the gray screen appears.
Hold the keys down until the computer restarts and you hear the startup sound for the second time.
Release the keys.
After resetting NVRAM or PRAM, you may need to reconfigure your settings for speaker volume, screen resolution, startup disk selection, and time zone information. If issues persist, your Mac's logic board battery (not a portable Mac's rechargeable battery) may need to be replaced. The logic board battery helps retain NVRAM/PRAM settings when your computer is shut down. You can take your Mac to a Mac Genius or Apple Authorized Service Provider to replace the battery on the logic board.

 

[Lucianrider]

You might have another keyboard paired to it that you're not aware of, make sure of that it Bluetooth preferences.

Turn of IR remote in security preferences.

You might have a faulty keyboard, try using it with another computer if you have one, see if the issue happens on that one too.

You could also go into keyboard preferences and select "Use F1 F2 etc keys as standard function keys" and see if something else (like expose) happens instead - just as a test.

If its none of those, then it's probably some software on your machine making it happen.

I just wanted to thank this person because I was having the same problem and it was driving me nuts!! I was about to call Apple for my 2 month old 27" iMac when I found this post. It was paired to the new bluetooth keyboard the machine came with that was still in the box never used about 15' away!! From the time I took the new iMac out of the box it has been connected to a wired Apple Keyboard so I never thought that it was seeing the other keyboard!!

You live and you learn!!