Last month, I'm noticing that my screen are having horizontal lines and vertical lines/shadows flickering whenever my screen is white or something of a bright color. There is also no physical damages and whatsoever. And earlier, I opened my phone to check what's my schedule later about my studies and suddenly I shocked it's all over my screen are showned the horizontal and vertical lines, after that I immediately restart my phone and waited for it. And guess what? It's already fine and there is 3 lines shadows left in the upper. I dont know what to do, by the way I'm using Samsung Galaxy A02s
