Help Screen full of numbers nextnook8

Feb 18, 2018
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I have a nextbook8 sometimes I will be playing it and all of sudden the screen will change to a screen with just number scrolling endlessly up the screen. Other times it will just go blank like I shut it off except the screen will still glow in both instances I lose control of the device and cannot shut it off I haved to wait for thed battery to die andx most often it won't turn back on for a long time. What's happening how do i fix it?