i think factory reset is it the z axis when you said that it was stuck my frist one had the same issue did your z axis had a stange sound if yours is the a1 lubricate the z axis scew rod if yours is a1 mini go to the wiki
I did a factory reset and even downgraded the printer and reupdated it. Still no fix. I think there might be a short somewhere. It acts like it is going to home but then just freezes