need to know the name of the part im looking at?

if i could know the name of the part i could aquire it, it sits on the far back right side, massive amounts of electricity must be going through it, there is a tear in the insulation resulting in an electrical arch on itself, it is a large part with a copper band around it, one red wire and a wire that goes to the top of the back side of the screen with a rubber gasket. i got some part numbers of it but nothing. its size is aproximately 2"x3"