@deckingman said in Extruder Stepper suddenly only vibrates:
If I understand correctly, it was all working fine and then suddenly stopped working yes? Did you make any changes between when it worked and when it stopped working, including changes to firmware? If the answer is no, then the cause is unlikely to be firmware unless the file(s) have got corrupted somehow (unlikely). You get the same behaviour using different driver chips, different motors, and different cables yes?
If the answer to all the above are yes, then the only common denominator is the hot end itself. i.e. you have a blockage and the extruder can't push the filament against this blockage so it "vibrates". The other alternative might be something mechanically wrong with the nimble causing it to bind, stick or otherwise not rotate, but I have no experience of these so can't comment further.
I did not make any changes to config or Firmware.
I did check the extruder for blockage and everything worked fine, until I applied power.
This applied to any stepper I connected, even without any load on it.
I just created a new config and everything works now, seems the config got somehow corrupted in between or the SD had a bad sector.