even if it is working, may be worth having a check of the 5V power lines to the mainboard (Orangy red cables) from the PSU
i had a fully loaded ESCOM vintage A4kT and managed to melt the tangs inside the plugs that connected to the mainboard from the PSU.
an easy swap, but went through two PC/AT PSU's that way. the mainboard wasn't damaged, just the plugs got scorch marks!
