Psu power testing

adamfya · 21 Feb 2021 at 11:05

Testing psu on bench, pin 14 is just outside of -voltage.
Get -10.4v, with 10% tol. Should be 10.8...
Would this be enough to cause a no boot scenario??

Mr Evil · 21 Feb 2021 at 12:57

I don't think there's anything in a modern PC that even uses the -12V rail. I doubt it would prevent booting even if it was missing entirely.

adamfya · 21 Feb 2021 at 13:12

its far from modern!!!
tested it on the back of the board and it sees -11.6v.
dont think its the psu at fault...not sure where to go with it now. would like to get it going just for the challenge..been on here getting some advice on new build specs...

Mr Evil · 21 Feb 2021 at 14:14

If it's -11.6V when connected, but only -10.4V when disconnected, that's probably because that rail needs some load on it to function properly, which is fine.