I recently purchased an Atari 2600 4 switch CX-A on Ebay.The system works fine,joysticks,paddles,sound,etc... But,I am not getting color in the games.The screen is pretty much all grey,even with the color selector switched to "color".Is anyone familiar with this problem? If so,is there a solution that might solve it? Thanks!

Video Game Consoles & Games - Atari - 2600 Console