I am afraid that I have been jumping around too much and now, even with good shop notes, am not sure what elements/modules I think are good and which might be bad. Looking at the troubleshooting diagrams every thing still points to the HV power supply. Currently there doesn't seem to be any out there so it is a case of building a complete unit or repairing what is there. I am coming close to declaring this unit a parts machine and closing the book on it but I hate to do so. A repair might be right around the corner or I am missing the obvious and the fix is staring me in the face.