Here's what I know:
this cart is so clean you could eat off it. I've cleaned it twice, took it out, did an eraser and cleaned it some more. Maybe the slot where the cart goes could use some cleaning, but I can't get in there....
Because I took off the cart casing I can see a nice new battery instal on this. I knew it wasn't the battery as it worked on his set up, and sure enough, the oldest CPS3 game who's original battery could still be working has a new one. Not that, then.
People tell me the cart's not making a connection, but you can see when it is since it goes black WHEN it's all the way in.... you can tell. It may be voltage, as things happen as it goes up and down, but I doubt it. Mean Bean says it could be static, but how do you get rid of that? Perhaps you don't? I'm not sure....
It's two seconds away from working, but it just doesn't... it's killing me.