My laptop does not turn on?

[Justin]

Early this morning I decided to turn on my laptop. It was good for the first 5 seconds when it started at the dell screen and loaded. But then it suddenly shut off all by itself. So I assumed the battery needed to be charged so I hooked up my charger and proceeded to turn it back on. But every time I press the power button it seems to give the green light that it is turning on, and then suddenly shutting it back off 3 seconds later. I find this odd because just the previous night it was working completely fine with out any problems. Is there a way to fix this problem at home with out having to take it into repair or paying any kind of money? If you need to know what kind of laptop it is, it is a Dell Latitude D505