and am happy for your quieter computing.
Here'sa link to a post by Robert Proffitt. Keep it in mind if things recur. The result of bad capacitors on a mobo can increase the magnitude of the noise [AC] current being absorbed by the caps in the power supply and eventually cause them to overheat and fail. I am glad this his shop found this.
Hey old buddy,
New 450 watt PS ws delivered today. Installed same, and my old odd noise is gone.
Of course this supply has 2 fans, so now listening to a bit more "whoosh" noise.
But this is totally acceptable, compared to what I had been hearing, so PS did fix my problem.
Just wanted to let you know.