I just replaced my old board, processor, and memory in my backup comp with an MSI K8T Neo-V board, AMD Athlon 3800, and 1gb memory. I got it all set up, and powered it on, but the fans kicked for a sec, and the power LED flashed on, but went off almost instantly. I re-seated everything, and unplugged all unnecessary devices (HDD's, etc), and it still did the same thing. I'm thinking it might be power supply, but it worked immediately before the upgrade. Any thoughts?