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screen goes black after opening to a certain angle
I was using a plastic case that someone gave me, after a while I noticed that it got heavier and after about 4 or 5 months the screen started to go black at certain angles, now I can open it right before 90 degrees, about 80 is the most. very few times I made it to open more than 90 degrees but opening it very slow and steady. I don't know what to do, I tried to open it but I couldn't find 3 screws, I suppose they are right under the rubber things on the corners. please help :'(