New Game Cars Slot makes Screen go Crazy

I am having this issue too. My original game card reader had a bent prong. So it didn’t read cards but the screen was fine. When I put the new one I just got today in, the screen went wild and was basically like something was touching the screen. But also still did not read a game card. I removed and put back a few times. Same issue. Then I put my old one back, the screen works fine but the game card reader doesn’t because of the bent prong.