SKR mini 3.0 and replacement of it

[Blisk]

Your question or details you need. Please describe.
My printer start to move x axis motor really fast left and right when I start to print it was like vibrating and making a lot of noises.
Than I replace SKR mini 3.0 with new board and upload firmware to it and connect it to printer with TFT35.
Now when I turn printer on I get message "no printer attached"
When I try to move any axis it doesn't. Not working.
When I turn into marlin mode it works ok.
I checked serial cable and it is connected like it was before I changed SKR mini 3.0
What can be wrong here?
Do I need to do anything on SKR mini 3.0?