Not turning on after repair, but it does charge

So i replaced my charging port using this guide:

https://www.youtube.com/watch?v=1EsKchL4...

OnePlus 3 USB Type-C Port Replacement

Everything went ok, but i can’t get the phone to turn on. When i put it on my charger, it does connect (smoothly) and i see it charging (20% right now). But I can’t turn on the phone.

Does anybody have any clue what I did wrong or what part of the recovery i should do again? Because this means the battery is working correctly, right?

Thanks in advance.

EDIT:

Nvm, put on the casing and it turned on. Weird, according to the video i could check without it. Oh well.