Hope this helps: My 840av board is paired to an ATX or Quadra 650 PSU on a lab bench.
It will not boot like yours if the -12V rail isn't there.
Can't find where the -12V go in bomarc schematics however
Hello Stephen ! Thanks for your interest. Sure no problem, I will post it as soon as get feedback from testers. Need to test a patch that Espressif provided to me as well. Good job on the ROM-inator refresh by the way !