Review on 🔧 Enhanced Digital Microstep Stepper Controller 2 Phase: Unleash Precision and Efficiency by Darnell Golden

My unit was dead on arrival I changed it to another driver I had and everything worked fine. Tried changing it back to this one, still dead. When turned on the red light comes on and doesn't respond. The manual for this driver describes very vaguely what the solid red light means and basically just says the driver is dead and should be returned for a replacement if the wiring is correct and the light is still on. So it seems to be a general problem.