My brother put together a computer for my dad ages ago except he bought a power supply that wasn't compatible with the motherboard. Board had a 4 pin CPU cable and PSU had an 8 pin CPU connection. Except instead of returning it and getting a compatible one he just jammed the cable into it.
Anyway, my dad was trying to get it working again and seems to have knocked the PSU. He ordered an exact replacement from Amazon but I told him to return it and get a compatible one.
But he has no idea what he's doing. (I have no idea what the components inside the case are).
Is there an online (or not) shop that he can contact and they can help him over the phone to identify what power supply is needed? Or is there a good shop to take it into to get one? I can go to fit the new PSU but can't be there at the time of him ordering it.