Ahoy ye'all. T'is a grand frustration, these infernal machines. And how I love them so. So I'm finished building my new machine (specs below) and all attachments are made, all plugs (seem) to be snugly fit together, and I've read all the documentation. I'm very thorough before throwing the switch for the first time; it's a special thing to deflower a machine you build yourself. Plug it in, flip the switch on the PSU, and (anxiously urinating) push the power button. The computer then turns on for about 1/10 second, with all the pretty blue lights and the LCD gauge (for temp/fan info) lights up. And then it turns back off. The 2x80mm fans on the side and back of the chassis don't even have time to begin spinning. Specs: Apevia X-Telstar Junior Type G Gigabyte GA-MA78GM-S2H (microATX, I believe) AMD Phenom x4 9950 Black Edition 2X(Seagate Barracuda 7200.11 500 GB SATA-300) Twintech GeForce 8800GT PCI-Express 2.0 x16 Kingston (4GB PC2-6400 CL5 240-Pin DIMM Kit, 2 pcs. 2x2GB 800MHz) Antec Earthwatts 650 Watt ATX12V v2.2 Also, an old ASUS CD drive and generic Floppy drive, which I know work Now, I know that this is a power-hungry system, and that's why I went for a full 650 Watts. That should be enough for all this, yes? I've had computers that had fried PSUs before, but, they usually don't do this 1/10 second 'flicker' of power that I see with this one. Usually they don't do anything at all. There's no beep or anything, though when I turn off the lights in the room and examine the chassis as I turn her on, both fans light up (like they're supposed to) and as said, the front LCD panel lights up too. And then *poof*. Darkness. Silence. Confusion. Screaming. I tried pulling out the graphics card and one of the hard drives, to lower the load on the PSU, tried it again, and exactly the same thing happens. I also triple-checked the power-switch connector, and it is correctly inserted to PW+ and PW-. (As are the rest on the Front Panel Header). Pulled out and re-inserted MOBO power (2x12) and CPU power (2x2), just to make sure, and the same thing happens. Tried pulling out my hair too, but that just hurt. So now you know the story of my life. Any suggestions? (First person to say 'see a shrink' will get it good) <---Edit---> Also, it might be worth mentioning that I have cleared the CMOS as well.