I have a new ecs extreme motherboard with an apthlon 939 3000+ processor, with 512mb ram a new power supply and new hardrrive. I have a 128m AGP video card from a good machine. All of the itemes I am using have either come from a running system or have been tested in a working computer. My computer will turn on and I can get to cmos setup or to boot from cd, however, after about 1-2 minutes the system just shuts down.