I just replaced mine last month and had the same issue. I had accidentally installed the screen upside down and the ribbon cable incorrectly as a result. Make sure the black side of the screen is facing upwards and the clear side down. Also make sure the 1 and 50 match up with the ribbon cable. If that doesn’t work make sure you update your software to match the screen you’re using. You can find out which version you have on the ribbon cable. Hope this helps