Searched for help because my kindle fire 10 kept just going black. Tried all suggestions and nothing helped, UNTIL...Ran across a solution some-where online. It's the case! Who would ever think? I have always used cases for my kindle (have owned several) and phones. I have a nice case that includes a magnetic flap closure. If you fold that case behind the device, it activates a sensor in the upper left corner and turns it off. I'm talking about folding the flap flat behind the device, not when you try to stand it up. Someone, way smarter than me figured that out. Since I quit folding the case behind, it has not gone black one time. Hope this helps someone's frustration. Personally, the spouse and love our kindles.