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/4001178031759.html?spm=a2g0o.productlist.0.0.3fa739fauxMwxs&algo_pvid=6e25f7e3-3f5e-4313-baaa-85aa6b515b95&algo_exp_id=6e25f7e3-3f5e-4313-baaa-85aa6b515b95-24&pdp_ext_f=%7B%22sku_id%22%3A%2212000025813630807%22%7D&pdp_npi=2%40dis%21CAD%21%2163.33%21%21%212.89%21%21%402101e9ce16583616425967244eb1cc%2112000025813630807%21sea
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.