Samsung plasma help

[jerkyjake34]

I have a 42 inch Samsung plasma that's about a year and a half old. Between my kid, brother in-law, and myself Gran Turismo 5 has been played quite a bit. I now have a speedometer on the bottom of my screen that won't go away. I've watched some tv and movies on it, and had that gray bar scroll across the screen for awhile and it's still there. Any ideas to help me make this speedometer go away? I'd like to play some more Gran Turismo, but i don't want to make this more noticeable than it is now. Any help would be appreciated.