Maybe you mean you saw a power supply spin it's OWN fan and shut down? That would be different, and certainly possible - but that is not the scenario the poster described.
Not to belabor the issue but that
is the scenario described.
Nope, read again:
Hey,
Thanks for the tip.
Repeat of the same.
On just the PS with the mb cable jumped - I get 1-4 revs of the PS fan, then nothing. It's like something clicks off in the PS as soon as it ramps up.
On the PS with one board attached - I get 1-4 revs of the PS fan, the board fan, and the two case fans, then nothing. Same kind of behaviour, almost like something clicks inside the PS as soon as it begins to ramp up.
Repeat for all boards.