Replacement Screen does not show anything on screen

Hi so I have a Blackberry KeyOne that had a cracked screen so I replaced it with another OEM part but now I see nothing on the screen at all. Unfortunately when I was disassembling the old screen I damaged it so I can't use it again but I have tried 2 new screens and see nothing. Is there a reset or something I have to perform on the screen? I have repaired multiple iPhones over the years but haven't run into this issue before. The Blackberry powers up and I can hear notifications and feel the phone vibrate so I know I haven't killed it (fully!).

Thanks for any help in advance!

James