maestro wrote on 2021-07-10, 03:45:
Ever see the movie Sunshine? Look at my values ... What do you see? *Epic music commences*
Can't say I have. Or I don't remember it. But point is, there aren't any obvious shorts. The varying results are due to various capacitors charging up a bit, that's normal.
So, perhaps it's not a capacitor issue after all? Remove the CPU, try again. Obviously the mobo won't boot but you'll see if the PSU is now kicking in properly or not. If so it would point to the CPU, it's voltage regulator, or the PSU just not working properly (mobo by itself draws little power).
Could be PSU caps - shorted or dried out. Tests for shorts, obviously with PSU disconnected and prefarbly give it a minute to fully discharge so you don't damage your DMM. Test resistance between each colored wire and black (which is GND). Some lines might be as low as 10-15 ohms, especially the 5V one, but less than that would suggest a shorted capacitor. Inspect it visually as well for any signs of leaking electrolyte or bulging/venting.