Hi there, My Black Macbook's (2.16GHz Core 2 Duo) in-built audio has suddenly stopped working. There is no 'Dong' at the startup. In the system profiler under the 'Audio (Built In)' tab it says that there is 'No Built-In Audio'. I can't change the volume or anything and in system prefs under sound is says no output devices are found. Has my soundcard fried? Is there anyway of replacing it fairly cheaply? My macbook is out of warenty unfortuantly! Is the only other option buying a cheap USB soundcard ? If so does anyone know of any slimline ones that would work? Any suggestions would be greatly appreciated! Thanks!