By chance did you use a spray cleaner on the display? I’m suspecting unbeknownst to you some of the cleaner found its way to the bottom of the display wetting the logic board at the bottom of the display which you can see here
[image|1842588]
Hopefully letting it dry out will bring your display back to life, if not, you’ll need to replace the display assembly [product|IF117-029] following this guide [guide|27657]