Problem with my Samsung Galaxy (Grand Prime)

[AC Question]

Whenever I turn my phone on it shows what you see when your turn it on (Samsung Galaxy Grand Prime in the middle of the screen with "Powered by Android" on the bottom of the screen), and it stays on this screen for roughly 30 seconds and then turns off by itself and then turns back on, the process repeats. The only way I can really turn it off is removing the battery but when I turn my phone back on the process occurs again. Any help would be much appreciated.