Help me my tablet just all of a sudden stopped working, everything is basically fine with it besides that it won't let me touch the screen at all. It also charges weird, I have to always have it on a charger other wise it won't turn off the screen just keeps popping up. So this morning I had left it on the charger as usual and then I came back to check it and the buttons work fine like the on button and sound but whenever I touch the screen to unlock it and use it, it doesn't do anything like it won't let me touch the screen for no reason. Please help