Chosen Solution
I recently tried to replace my Iphone SE screen with a Iphone 5s screen but it isn’t working, I have tried the screen on my Iphone 5s as well but the screen didn’t turn on for that phone either. Am i doing something wrong, or is it the screen?
Most likely an faulty screen. Did you check if the phone turns on by plugging it into iTunes and see if it detects it?