Yes, a few. First, put it in setup, jog, and step. If it does not advance one thou each time you press the - key, it is very possible that you have a blown transistor. They usually short, so the rotor of the motor cannot get away from that field.
This is extremely common but can be minimized. How long have you had the machine? How familiar are you with where the components are? Do you have any spare 2N6547 transistors? Can you use a meter to find a shorted transistor using the diode check (voltage drop across a semi-conductor junction) feature on the meter?