My MacBook Pro won't start

The other night 3 of my keys weren't working on my MacBook. I reset the computer to see if it was just a malfunction when my computer came back up none of the keys were working so I couldn't log in. I manually shut the computer down and now it won't turn on. It was at 100% battery before I turned it off the first time so I know it didn't run out of battery ( I plugged it in anyway) but it's is still unresponsive.