During my morning train ride, I was reading on my 10 inch Sylvania when the screen went dark. Turning it on and off a few times didn't help. I put it away and left it until the end of the day. When I had time to check it, the screen was still dark but the battery was HOT. With no display or wifi, battery life is about 10 hours. This time the screen did turn on. I am posting this as a suggestion to keep the stylus handy and try a soft reset if the screen goes dark. I suspect that would have solved the problem this am. Just hope it doesn't happen again.