Thanks!
Are you familiar with opening up your computer to look around or check cables and stuff? You could try take off the side of your case, just to ensure all the cables are in correctly and none are loose. Just make sure all your peripherals are disconnect along with the power cord. Then make sure to touch something metal that's touching the ground, before checking. It's easy to do.
It could be an easy fix like that.
Otherwise, I guess it could be more hardware related, and we can try diagnose.