My Ipad 6th gen decided to went black screen after just pressing the power button, I tried to hard reset it, restore it and put it in dfu mode or recovery mode but it still wont work. This happened to me 9-10 months ago and it went back ok for just a few weeks by leaving it to drain its battery for months and it happened to me again and its been 5 months now, but when I put a flashlight above the screen it will show some display.