Chosen Solution
i replaced the screen on my iphone 7 plus and the new one doesn’t work but the old one still works the new turns on but it black
When you say “it turns on but it is black” you mean you can see the backlight being powered but there is no picture? In that case it is likely a faulty display. You could try reseating the connector for the display, but it is likely connected since the backlight is receiving power. First I would try disconnecting the display, then carefully inspect the connector for the screen as well as where it snaps in, checking for any damage to the pins or if the connector itself is bent/warped. I would also check to see if there is any foam around the connector that perhaps fell in, not allowing the connector to seat properly. If everything looks fine there, it is likely a faulty display. Where did you source it from? I would try getting a new one, and some of my favorite suppliers are repairpartsplus.com or mobiledefenders.com Good luck!
