For those who didn't know, I have a NES. A (Kind of?...)broken one, at that: the 72-pin connector has oxidized (Now replaced with a spare, so that's good.), and I think when my uncle tried to fix it, he put some of the screws in the wrong places to the point where the whole thing is loosely held together. It does work, however, but only half of the time.
Today, I think I fixed it. The NES feels pretty solid now, so that may mean I fixed it. I'm going to check if it worked in a few minutes by playing some SMB.
EDIT: Haven't got the kinks ENTIRELY out, but it's working a lot more than it usually does.