Panasonic AG-500 No Power

[MIPS]

Whoever said it's not just a diode is right and wins a cookie.
I did a suicide test and with the diode unhooked I ran it line voltage with a foot pedal to briefly power it.
We got high voltage, too much in fact. B+ peaked at 190v on the meter, so the power supply is not regulating and that is why the diode went.
(also after this test I checked the HoT and the spike didn't kill it)

I'm looking all over the primary side and the feedback area of the power supply. I see no drifted resistors, no shorted capacitors or diodes and the B+ adjustment seems to not be open. No obvious sign as to why it wouldn't be regulating.

[MIPS]

Okay I went over all the traces on the power supply and could find no indications that a cold joint or a cracked trace was causing the feedback circuit to not work.
I was able to locate and isolate the PSU from the rest of the set by desoldering and removing a single red wire immediately after out failed diode (not on the schematic but marked "a" on the PCB) and subbed a load of about 45w using 8 100ohm 25W resistors in series.
With that I can see the B+ adjustment pot is completely unresponsive, but the pot itself is not bad.