Trying to fix my NES

[FinalSmash]

Okay so I got it to work, partially. The game has to be in juuuusst the right position, or it won't work. It had to be touching the pins the least amount possible. And I don't have the correct AC adapter, so I have to use a 12V. So, when I've been playing for like 5 minutes and I turn it off to play something else, it doesn't work.