this problem started a couple days ago. Whenever i use my ipad 4, about 10 seconds later it completely turns off and screen goes black and then the apple logo shows up and it turns back on again and then i start using it again and then it turns back off again and then on again and so on... At first it happened every now and then and then it started to get more and more frequent and now happens every 5 seconds. I have no idea what to do or why its happening or how to fix it? someone said its to do with overheating... can someone plz help me fix this?