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?