donjlegacy

Hi here is my issue:

Whenever I do something that puts my computer to work such as play a game, my fans kick into a very fast speed and after a few seconds the screen goes a bunch of crazy colors. At that point I always turn the computer off. What is causing this issue? I have a few theories but I can't come to a solution and I would like an expert opinion on what to do. I am a college student with very little money, so I cannot take the computer in for repairs. Also my warranty is no longer valid.