Shift key appears to be constantly engaged

Everything I type on the keyboard is in all capital letters or symbols like the shift key is constantly on. Nothing like water or anything that I know of has spilled onto the keyboard. I left it on over the night on the nightstand and the next morning the problem appeared. I can connect a mac keyboard and everything is fine. The computer boots into safe mode and from what I understand, this happens when the shift key is pressed on boot up. This is what makes me pretty sure something is going on with the shift key component. Unfortunately, I am just outside of my 1 year warranty since I got my laptop last Christmas. As if this laptop is not expensive enough without needing an extended warranty, seems like this would be a genuine warranty issue but alas no extended warranty. Any suggestions? i am not worried about opening up the machine to take a peak inside since it is already out of the 1 year warranty. Anyone else, other than the guy who spilled water on the keyboard, having this issue? Any suggestions or help would be appreciated. Otherwise this will become an expensive paper weight since it will not function as a laptop anymore.