I have a bridgeport CNC with a heidenhain 151 control I'am getting a alarm Measuring system defetive (A) AT one time I could power down and power back up and the alarm would go away. can not do that anymore? I have good 24vdc and good incoming 230vac. I swap X&Y motor cables to see if the alarm change but it did not? It would be nice if some could help Me out? Thanks Lee