our bridgeport interact 4 won't allow the spindle to turn on. fliud level is good. proximity switch is good. when we try to turn on the spindle the fan will come on but not the spindle. the control is a heidenhain tnc2500 and the spindle control looks like a ktk ltd. we have had someone try to repair the fac-1r board in the spindle control but get the same problem and there is no error message. any help would be appreciated. even a place that repairs or replaces spindle controls.