Digitizer don't work after replacement

Hey,

My wife IPad has been smashed by the dog. Touch screen was working (I tested every corner and other places) but it was so smashed so we couldn't use it anymore. I ordered new digitizer and watched some tutorials and videos on YT how to do this. The hardest thing was removing old smashed digitizer and clean old glue. When I done it I connected new digitizer but it don't react for any touch. Sometimes screen is moving my it looks randomly. For me it looks fine but could you tell me what could be the reason? Pins looks fine for me but when I was removing old glue I scraped off some black paint on that thing between connectors and battery connector. Could it be the problem? Replacing digitizer in some service in Poland is pretty expensive and Apple can only replace whole device for price which is higher than new one (wtf).

I also tried to connect broken digitizer but I cut flex cable when I was removing broken digitizer.

Photos of connectors:

https://ibb.co/Fhb45NH

https://ibb.co/ccd7PQq

https://ibb.co/7Ynp33H

https://ibb.co/YQyY96p

https://ibb.co/WPTRqPF

If you have any idea or any info how could I check what is wrong please help me! It was present for my wife and I really want to fix ix!

Edit:

Case is related with IPad 10.2 9gen A2602