Hey everyone,
A few months ago, I sold my father my PC after downgrading the GPU and the PSU. (then i built a new one with the recycled GPU and PSU)
However, this morning my father's PC decided to not power on at all. I did the usual check of plugs, switches etc. and did not get lucky.
I figured that the power supply would be the issue so I tried using my PSU on the faulty system and that worked.
Out of curiosity, I tried the 'faulty' PSU on my system and it powered on.
ie and TL:DR, his power supply works on my system and not his, my power supply works on both