I have a HP ENVY dv6 Notebook PC which for some reason even though it recognizes I have something plugged in still does not work audio. It worked for a moment just fine and then cut out and I cannot find a reason for it. Can someone tell me how to figure out why the this is happening and how I might go about fixing it. I do not think it is the plug because if it were I do not think it would register something is plugged in..