A few days ago, my tablet just froze and then the screen went black. Later, it said "Android is Starting (Starting Apps)" for about 15 hours, and then it ran out of battery. When I try to plug it in and charge it, it shows my a graphic of a power outlet, a plug, and a yellow warning sign with an exclamation point before cutting to a picture of a battery that says "0%." This is very confusing! I've already tried a hard reset, but nothing happened, please help!