My Macbook Air suddenly dropped both Sound and Video capabilities: - Video (Youtube etc.) runs for 2-3 sec. and then comes to a halt. - The Audio hardware has completely disappeared from the Audio Hardware menu. Any of you have experienced similar problems? Might it be related to heating issues of the MBA (frying out), we do use the MBA a lot in Bed to watch movies, so the vents are sometimes covered causing the machine to heat up quite a bit. Thanks for sharing your experiences, also as this machine is still under guarantee we're trying to get it repaired under the (standard) Apple guarantee but they're trying to refuse the repair stating that we didn't handle the machine properly, so any similar cases would be more than welcome.