This happened to me again tonight. I have 2 tablets and this one isn't used often. It went black on me tonight and I googled this to find the answer as to why. Another post I read said to take it out of the protective cover because the magnetic closure might be interfering. I have done this numerous times in the past and it never goes black when I use it without the cover. I had forgotten about that suggestion. I have not looked yet for a different cover that doesn't have the magnets along the sides to keep it closed but maybe that would be the fix.