My machine was working fine with Mach3 prior to some fumbling with the software.  Now I am seeing all black on the LEDs on the Diagnosis page.  I have reverted to a Port/Pin configuration that has been known to work, the breakout board appears to be functioning and is responsive to limit switches and when I disconnect the parallel port.  A total reinstall of Mach3 makes some Pin LEDs green but I still have no control.  Jog mode is currently and permanently off.  What should I try?