My son's kurio has decided to just stop turning on. I've tried different chargers, I've checked the charging port which seems fine. This happened once before but, I just left it charging for a few days & came back to it & it turned on. But, this time it's not turning on at all. Any other things I can try or is it time to just buy a new tablet? He loves this tablet! I really don't want to let it go.