Here is what happens:
1. I press the button
2. The CPU fan turns on
3. There is no video signal
4. The computer turns off
Right now, I have it at bare bones, with just my SATA HDD plugged in, my 8600 vid card, and a keyboard.
I have tried: a different type keyboard, no HDD, a different vid card, two different monitors (i have found that my LCD is sometimes too slow to turn on), and any combination you can think of between the two sticks of RAM (even no RAM).
My instinct says overheating CPU, but I don't think thats it, as it fails to explain the lack of video signal, and I have the heatsink ziptied to the MB (the little clips broke...zipties work just fine, and have been for months now...)
I'm worried that I may have damaged my MB...
(Also, I thank Nintendo for adding in USB keyboard support for the Wii...I wouldnt want to be typing this letter by letter...)