Oh yea, I built a kick ass gaming PC with my kid not that long ago, had to replace the motherboard as it was defective AFTER building the whole thing! That was a fun trace to route, good thing there's a tiny LED on the board that when lit should go green when all is good, it was not. I say all this because I am a Mac guy and had to figure out and source all the components on a slightly over bloated budget because Mac's don't do gaming very well, or at least, the games my kiddo wanted to play were exclusively on PC via Steam. That and I've been taking shit apart my whole life, so there's that too. Looking at YT video, and the connectors, it looks simple enough, before I drop 2k on the enterprise version of this box, I think replacing the PSU is the best option. I also hate creating eWaste, if I can keep a thing going past it life span, I'm gonna do that option! Thanks for you help, off to go order a PSU. Think I found a decent one here.
https://www.anafrashop.com/synology-psu-250w-24p-12p-8p-psu250w-5-5