Hello - This old hurco has been working good until today...after a few test pieces the xy & z axis would not move with the rapid buttons or the adjustment wheel. After a few seconds the emergence switch kicked in. I did hear some "crackling" sounds coming from the head, near the limit switches maybe (sounded like a possible short). Could a short up there cause all the axis to not work? I don't think my survos are powering up, but then again I am new to this machine. Any troubleshooting help is appricated. Thanks