CX - sounds like bad mobo caps. I am betting if you take a closer look at the PS fan its spinning very slowly. I have been down this road with a CX before, even recapped the power supply. It was not until I had the board recapped did it work fine again. And I will add that it did boot a few times when I first got it before it failed outright.

SE - toasted - I have all the parts you could need if interested.