Replacement screen not working

Hi,

Ive got an iPhone 7 and I've changed my screen. I bought a replacement screen off amazon which didn't work (the display was glitching) I returned that one and bought a second one which didn't show any image but the backlight turned on, I bought a third screen which is having the same problems. When I put the original one on it works. Does anyone know anything that will help. The chasis is slightly bent so I dont know if that could maybe be causing some sort of short but the original still works.

Thanks