I Dust it off and reconnect but still sameThe PCB is made from 3 parts, you can detach 2 of them (plug off the white leg thingies), the big square part is CPU, the small rectangle is graphics, it holds all the graphical data of the game. Detach all of them and inspect. I suspect that there is a corrosion on the chips legs of the graphics part, but hope not. Dust it off and reconnect