I was in the middle of a youtube video and the sound suddenly went out. I've checked/ updated all the bios and drivers to no avail. I did a restore to a point from months ago, but it didn't help either. It'll still play through headphones or speakers plugged into the headphone jacks, but not through the internal speakers. When you go to devicemanager, it acts like it's working perfectly, although it's obviously not. Any help would be greatly appreciated!