problem with hp quick lunch?

hey, i have a hp laptop with a quick lunch button, but it seems that it doesn't work anymore. because of that i dont' have any sound anymore. when i click on my audio device, it says no audio device installed. i dont'know much about computer, so if anybody know a easy way to fix it, i will appreciate it.

i used "recover" from an earlier time when i didn't have this problem, but it didnt change a thing.

i don't have the original cd to make a default restore. plz help. tks