Screen doesnt turn on

First time doing DIY screen removal. yes this is on me. screen is working prior to removal of it but there's a gap on the bottom corners which needs to be glued.

here're the things that i did which may lead to this project going souht.

1. lcd is still connected to the mainboard. battery is still on too.
2. when i removed the screen. the copper film peeled off from the panel.

I believe nothing should be damaged. afaik the copper film on a poco f4 "GT" [cant find a device like this on the forum], is typically meant for heat transfer.