Hi i repair consoles and broken stuff for a guy that has a video game stand at the local weekend flea market. He gets me all kind of broken stuff ranging from nes's, ps2's, xbox's etc. Usually I can fix most of it. Recently he gave me 2 NES's that were broke. As soon as i put the game in i could tell they both needed pin replacements. I made sure they turned on first then ordered the pins. I replaced both NES pins. One works One does not. The one that doesnt work just shows a black picture. Sometimes it still blinks even with the new pin installed as the other works first shot every time. But always just shows a black screen. Does anyone have any pointers to get this puppy running again.