Bought a bunch of Genesis games (about 20) from Funcoland about a month ago....2 of them didn't work, got out the ink erasure and the TV Tuner/Electronics cleaner, (the stuff that leaves behind no residue or lubricants)...still didn't work. I have revived other carts with a stern cleaning using the above methods, but not these carts. Battery carts are easily fixed with a general knowledge of soldering skills and a new battery...done a few of those lately. Now I'm into changing the LED's to different colors in certain systems that have them...how about a nice blue glow when you turn on your Genny!! The Keeper of the Old Games