Help! I have a late 2008 unibody alum macbook, suddenly the internal mic stopped working. It's not working with skype nor garageband. It's selected in system preferences but the bar in the input label of the menu "Sound" does not move at all, only if I tap my laptop near the microphone. (upper left corner of the keyboard). I've used Mroogle and I haven't found any answer. My laptop is like 8 months old so it may not be a hardware issue. Any advice is welcome. Sorry for my bad english i'm not a native speaker.