From one of your replies in another post I used this: NU5T-14G381-BB - SYNC 3 APIM Software (IVSU) Database - CyanLabs.
So I just ran it and it worked, no error message this time. I did the manual install and downloaded the autoinstall, ran it and the “Updating System Software” message popped up, after about five minutes it restarted and now the screen is lit, working but dark, not off or broken, just dark.
I have tried doing a soft-reset, also tried turning the truck off, opening the door and closing it, locking and waiting until the screen goes from dark to completely off and then trying again, it is stuck like that now. Let me know if you have any other steps I should try
Reference post: Updating from syn 3.3 to 3.4 with a non touch screen on 2019 ford edge 4 inch screen - #3
Version: NU5T-14G381-BB