I am having trouble with my New Tech HA441sewing machine. It just seized up and then the bobbin piece broke. I recently had to replace the hook assembly because the piece my bobbin spins on just snapped off. I got a new one and after sewing a full saddle skirting and almost got through the second one when it just stopped. I can’t spin the flywheel by hand at all. I had to take my needle out through the bottom. The flywheel moves slightly but then just stops like it’s hitting a wall. I can’t move it and I am stumped as to what is going on. Any help is appreciated.