Nope, I’m just running one power supply.
Not sure if I’m offering any helpful information here, but the panel was partially fried when I purchased it used off of eBay a couple years ago. I think you made the suggestion it might have been struck by lightning. Additionally, when I received the panel, the I/O cards that originally were with the panel were not packaged at all and were floating around inside the panel, not plugged in. They all had components broken off of them (I assume during shipping) that would have had to have been re-soldered.
As far as damage, I had a chip blown out on the CPU, a chip blown out on the Power Distribution Board, and no I/O cards that looked like they weren’t damaged.
So I went ahead and spent some money to replace everything on the panel, except for the power supply, and the DACT, which I’m not using. The ground fault was there both before and after I replaced everything.