Galaxy S2 randomly turns off on its on even when its fully charge or has a lot off battery life left. After it randomly offs it wont turn on. Tried charging it but shows the battery with an exclamation point. and at the same time it wont turn on even when its charging. Tried taking out the battery and putting it back on a couple of times but no change in result. But when i leave it alone for 30 minutes or so im able to turn it on. Please help me.