[KarmaKiller]

Might want to start a new thread. Lots more people will actually look at it.

And might do a bench test.
Remove the motherboard from your case. Set it on something non conductive (cardboard works fine) and plug in just the bare essentials.
-CPU and heatsink
-1 stick of ram
-video
-power supply
You can power it up by touching the on/off pins with a screwdriver, or something else metal. See if it posts then. If it does, start adding parts till you find the culprit.
But you should start a new thread.