SNES Game Black Levels Off

[Darko]

So I have a copy of Earthbound and FFIII(u) that seem to have an interesting issue. When the title screens come up they are gray, not black, and have a little line going through the entire screen vertically. Does anyone know what causes this? It's not a huge issue, but I'd like to figure out how to fix it if at all possible. I remember reading something a long time ago that suggested the pins had been polished with a machine or something, but I can't remember the details. All of my other games post pure black title screen backgrounds (when they have them that is) so I know it's not the SNES.