Gutts on Table - No Joy

MB: ASUS Striker Extreme
Graphics Card: EVGA GTS8800
Memory: Ballistix DDR2 800Mhz
Case: Antec Dual power supply

History: System has been running fine for over a year. Lately it has required multiple resets to boot up. Eventually that ended and I get no post. Did some of my own research narrowed it to what I thought was the MB. Worked with ASUS over the phone they had me RMA the MB. Upon return same problem.

Status Que: MB is outside of the case. 1 RAM stick in slot (1) ~tried others. Have tried graphics card in both slots. Checked PS operation using an Antec tester I bought look clean.

Symptoms: No Boot, No Post and after a short while the system self powers down.

I agree with your comment about ANTEC they are good! There was a issue with the PS when I first did the build a year ago and they did replace the PS for me. At that time I also bought there PS tester so I feel pretty confident that the PS is not the trouble. As for power I have plenty over 1200 W.

Thanks