However, last weekend the internal speakers stopped working. Sometimes it worked after a reboot for about 5 minutes max, mostly less.
I searched around on the internet, but all kind of suggested tricks didn't work (like reset PRAM, plug and unplug a headphone, starting GarageBand and so on.
Today I contacted the apple support and they gave me the following trick to try. I share it with you, because this one I didn't found on the internet.
- Shutdown the computer
- Unplug the powercable
- Keep the powerbutton pressed for 30 seconds. This will reset the SMC. This will in no way affect your data/installation. See also (http://support.apple.com/kb/HT3964)
- Plug in the powercable
- Start your iMac and here you are, all things are fine again (till now at least :) )
Edit: I just found this solution somewhere on the apple site. However, I didn't find it relating to my problem (I didn't search that well I suppose).