windows vista on a dell d810

ive been running xp pro on a dell d810 forever worked great. a friend of mine put the beta 2 version of vista on it last night and theres nothing i can do to get the audio jack or headphone jack whatever the term is for it to work tried installing all the updates including the update for the integrated sound card works great but i get no sound when i pulg in my headphones

any help would be greatly appreciated

 

Bad headphones.

 

ive tried 3 different types so far...figured the same things...it also wont work with my audio jack i have running to my entertainment system

 

Then bad computer. That pretty much sums it for Dells.