HTC Bolt color inversion with pressure?

Hello. I’ve been looking on forums over and over again to see if anyone has the problems I do. Unfortunately, no one has this specific one. I have an HTC Bolt and it’s only just started doing this today. When pressure is put on it, by sitting on it or otherwise, the colors invert. I’ve checked to see if the color inversion box checks itself and it does not. The color sticks for a bit, and varies in time depending on how much pressure is put down. Does anyone have an explanation for this?
EDIT: Colors are currently reduced to blues, browns, black/grey, white and green. Everything else is very dull.