Quote Originally Posted by Marm View Post
The very last thing I want to do is download a random zip file from the internet.

Isolate the extruder motor and see if you can get it to run on it's own. Rule out the possibility of it being a faulty motor. If you have another stepper motor, plug that into the extruder motors cable and see if it will run.
You are right to do so. I have isolated the motor and also the driver and they work fine. They just do not work when in the extruder place.