Laptop has problems starting up

My laptop is having a problem. Whenever I try to start it up, it will usually start up for a minute, with nothing on the screen, and then it will shut itself down. Then it will start itself up and do the same thing. Over and over until I manually restart it. Eventually I can start it up and it starts up fine, but it's damn annoying to spend ten minutes just waititng for it to start up properly.