GMGGG

It sounds weird and could just be a one off but I just had the same issue. It would light up when down but would not stop the needle in the correct position. I tried factory resetting the controller, unplugging the positioner, etc and was getting ready to pack it back up. Here is what worked as a last effort. I had everything connected. Shut off the controller. It still seems to have a little bit of residual power. I operated the pedal to force it to use the rest of the power. Looked like there was a brief error message then it shut down. When I turned it back on the positioner worked. SMH. FWIW, a CSM 3001 controller. Good luck.