A couple more photos... Also, to your question, yes. Confirmed several times, measuring continuity between pin 1 and 5v rail on PSU connector measures 0.3 ohms (which is the same measurement I get when shorting meter leads together.)

So far, that's good of your work, keep doing that with few pointers: That burnt resistor also the burnt capacitor area, are all in simple circuit area, I recommend draw a partial circuit around that to make sense, which is easier since you are in small area near hot side AC to DC rectifier and …

Thanks for the prompt response! I re-read you previous post and I think I follow. I did find on the PSU side, there is a 'sneaky' trace on connector side, partially obscured by the 24 pin connector, that ties pin 1 directly to the 5v rail. Unfortunately components were pretty badly damaged. I …

Greetings, I got excited when I stumbled upon a *recent* (or any, for that matter) post regarding one of these old proprietary Compaq power supplies. I'm at the point of trying to determine 'power good' signal and any other gotchas. I thought perhaps what I have so far could be beneficial to someone …