I too am really coming up short, but appreciate all of the suggestions so far. I did attempt grounding the stationary part of the dump using a test lead but it had no affect. I also tried finding the RF output to see if something shows up there but haven't found that pin yet.
I finally got mgross0's spare SV-771 so now I have a spare machine to swap the Video and RF boards out if and see if that makes a difference. That, or I need to send it to 12voltvids on YouTube and let him take a crack at it.
