Success!! Well some measure of success. I will explain below. Thanks
@vinnyoflegend Yep, I think you are right!
Meanwhile, I tore down my previous build because there is no need to order another A09 case. I already have one from that previous build. And, guess what. It works with the trusty old $10
used Delta Server-Power-Supply.
Well, at least it booted into BIOS.
More later, I need time to recover from tearing apart my main-everyday-PC.
Oh, It easily fits the A09 case with room to spare.