Maybe if this isnt working because of a bad audio controller, you could try a PCI sound card. Then get the drivers for that and change the bios to use the add on sound card.
But usually the controllers dont fail, so thats a last resort thing.
Audio cards are cheap though.
I noticed Dell has not been keeping the driver site up to snuff, I have a Dell Dimension 4700 and had problems finding the sound driver for a reinstall of xp a couple of weeks ago. I had the driver saved to a cd, so that saved my bacon.
Edited by rosiesdad, 24 December 2010 - 03:19 PM.