Just installed CPU, mobo and RAM in a new chassis. Specs are: P4 650, ASUS P5GD1 PRO, 4 x 1GB Kingston ValueRAM PC3200. When I switch on the power button, there is no display, no beep but the CPU, VC and chassis fans are all running. Then what happens when I leave the system on is that it powers off by itself. The more I try to power on, the quicker the power off would be. I've tried reseating the CPU and replacing thermal paste, rearranging RAM sticks, replacing the CMOS battery as well as resetting the mobo. Any suggestions?