You fixed the video - great! Please say what you did... after all, someone searching for just this issue will end up frustrated if you don't.
I take it you got as far as the sound test and heard nothing?
the first thing to try is running alsaconf as root.
then run alsamixer to make sure nothing is muted
--- failing that -----
AC97 is a supported codec, so it is the chipset driver you most probably lack.
Intel Corporation 82801DB/DBL/DBM
This is the same audio controlla as Dell Latitude D600
in the HCL. This works with the ALSA intel 8x0 module (SND-intel8x0) ... which is the same one I use and FC2 is supplied with it.
This leads me back to alsaconf.
I remember, I had an issue where sound vanished on me... and it turned out that the default stereo-out jack changed over. Swapping the speaker jack over solved the problem (and left a puzzle - I mean: how the... ?)
With most people it is just that everything is muted in alsa or something.