Grinding noise X axis

Hi guys, today in my V minion, after a full rebuild, the X axis makes a grinding noise while moving, and doesn't home correctly. What could it be? I also swapped board from octopus to octopus pro, but i also updated the cfg and in fact the Y axis works correctly. Mechanically it's okay, maybe a little gone the carriage, but not that much to make that noise, by hand it doesnt do that.