A.    If the Centronics parallel cable is being used, sometimes the plotter
      will hang because it is getting an invalid signal from the computer.
      Perform the following steps:
      
      1.    Unplug the Centronics parallel cable from the plotter.
      
      2.    Turn the power off on the plotter, wait 3 seconds, and then turn
            the plotter power back on.
      
      3.    If the plotter completes initialization, plug the Centronics
            parallel cable back into the plotter and proceed as normal with
            plotting.
      
      4.    If the plotter does not complete initialization, check the
            following:
            
            a.    If there are other communications cabling connected to the
                  plotter , such as: serial cable and/or ethernet connectors,
                  then:
                  
                  i.    Unplug the remaining cabling connectors.
                  
                  ii.   Turn the power off on the plotter, wait 3 seconds,
                        and then turn the plotter power back on.
            
            b.    With no communication cabling connected to the plotter, if
                  the plotter does not complete initialization, the plotter
                  requires service.