If you take the top off the power supply, with the power screws towards you. In front of the transformer is a screw coming into the left, going thru a metal plate. It holds the plate still, it was very loose and the screw and the plate were “floppy”
I dont see how the screw could be an issue as far as arching goes, it takes around 15kV to generate a spark across about 1/3". Are there two MOSFETS (rectifiers?) in the encircled area?
If so one of those could have been poor/defective and blew for “no apparent reason”.
I know how ya feel, I sent an email on Saturday afternoon, heard back by Tuesday. i called in directly and Griffin was actually replying to my email at that time.
Got the info i needed, Placed and order for a part I needed and had it in my hands on Thursday.