Apologies for the late reply. Also, apologies to PeterLI because, if I had the slightest idea of what I would do with a PS/1, I'd be all over that. As is, I've only become aware of their existence through your mention of the one you're trying to give away. 🤣
So, here are the pictures of the power supply with the attendant measurements (I intended to have the ruler in the pics for scale but my phone camera is rubbish, so there we are...).
Now, if anyone can point me to a good tutorial for re-capping a power supply or even diagnosing the circuit, that might be a shorter line to getting this thing in order, but my circuit board soldering skills have not been tested beyond soldering an iPod Nano battery to the main board, so that may be slightly more advanced than I ought to go. Worth pointing out, I did remove the cover of the PS and couldn't find any leaking or bulging caps, so whatever went wrong internally, it's not giving me any visual cues.
Probably a good time to suggest that if anyone can point me to a good resource for using a multimeter to diagnose the circuit, it'd probably give me more info to work with... 🤣
Yeah, I'll go put on my "n00b" hat about now. 😒