Is printer making any sound while initializing -when just turned on? Like spinning shafts doing some calibrations or such? Computer when printer is connected, - is it displaying any error code or message popping up on screen of PC? If you connect printer via USB - do you hear any notification from your PC - that it's detecting USB device?

If you think you need new board here is a link to Aliexpress with board, it could take a while to get it here though

https://www.aliexpress.com/item/40011780...

Also I would suggest to remove cover from side where main board is - and check what part number is on sticker of board and google where you can purchase that board other than in China.