My new replacement screen doesn't work

Hey, second time replacing this screen. The first time worked fine. This time, all normal procedures were followed to remove and reinstall.

The new screen doesn't work at all, basically. I checked whether the issue was with the phone itself by reinstalling the old (cracked) screen, which lit up straight away, no problem at all. Removed this and re-installed the new screen. Still nothing.

There is no visible damage on the new screen or anything that would suggest something is the matter with it, the ribbon and connectors look as new.

Any feedback appreciated, thanks!