I have heard it said that if one moved an axis manually that there was a risk of damaging the controller connected to that axis.
Something about generating a voltage and feeding it back to the controller.

Is the true ? if so what are the common faults that occur within the controller.
Those that are adept with a soldering iron are mostly quite capable of carrying out a repair,

I have had mor than two of these controllers that cease to function once the red warning is activated.

Thank you in advance