Sound won't play

Hi,

I'm having the same problem. My computer will not play any sound, although the mixer is showing that sound should be playing. All of my drivers are installed properly, and all are working correctly, or so they say. I have tried reinstalling my driver. There are no exclamation points.

This problem happened after my computer's power source got pulled twice in a row (both times while playing League of Legends). The cord literally got pulled form the wall, and both times I just chose the start computer normally option.

PLEASE ADVISE