I have a Hp pavilion G6. I had my hard drive changed and now i got it back but when i go to watch videos on Youtube or anything that has audio, nothing comes out. I went to Google translate and typed something in, then pressed the read outloud to see it it worked and yes it read it so the speakers do work. but on Youtube or anywhere else there is no sound coming out. Could it be the Sound card or that they put it the wrong hard drive? Any help would be greatly appreciated.