I think this big black spot on my laptop's screen is a dead pixel. I tried the pressure method on the small dead pixel and it was successfully removed. I also tried it on the big dot but I stopped when nothing happened. (I was afraid that it might spread and worsen the pixel) I also tried using a dead pixel fixer and ran it for the entire morning but it didn't work either. Can someone please help me? I don't know what else to do.