Ah, cool. Sorry I missed that. By the way, both sites list AMI as the BIOS, but I have PhoenixBIOS. So maybe not an exact match after all, but the chip/component layout is exact in both.

None of the boards on your website were an exact match, from what I can tell. This one is the closest: http://www.win3x.org/uh19/motherboard/show/3733 An exact match is here: https://www.arvutimuuseum.ee/th99/m/M-O/32128.htm

I have a Micronics 09-00144-02 REV A3 motherboard with PhoenixBIOS A486 (H45787 chip) ROM BIOS PLUS Version 0.10 G22-2LB. It's a really, old, dusty, crappy BIOS from 1989. Anyone had some successes flashing this thing to something more recent? Appreciate any advice.

Got it. That sounds like a project. Is there a good thread on troubleshooting a "dead" PSU? If it's not a complex task, I'd like to repair the Astec.

Thanks for the tips. Which PSU are you saying is full size AT? The Power Tronic is probably full AT but the Astec looks similar to this XT to me: https://www.ebay.com/itm/IBM-PC-XT-PS-Power-S … ic/284013203471

Here is a picture of the internals of the Astec (I think it's an XT PSU): https://imgur.com/ZQ5b3lZ I don't see any blown caps.

I'm building a retro gaming PC starting with a Gateway 2000 486/33 case and AT motherboard. This Gateway case has a structure that requires the power connector to be located beneath the fan: https://imgur.com/guWLi4k I bought a "used but tested" Power Tronic TK 4230DC taken from a Gateway 2000 486 …