My configuration is Intel Core 2 Duo E6600, X1950XTX Radeon, 2gb ram, 250HD, 500w powersupply. So one day I'm using my computer, which had been working wonders for 3 months, and it just shuts down. Then it wouldn't turn back on, at all, no power anywhere. So, I replaced the power supply. I made no other changes other than the power supply. Now it powers up, all the fans turn on (including from the video card), LED light turns on, even the CD rom driver works but I get nothing at all on the screen. And since i get a blank screen with both of my monitors I can't see how it's a monitor problem. I also get no beeps when I turn the computer on, and although I am not sure, I think the hard drive disk spins. I can't see how it would be the video card since it was previously working and nothing changed on that. The only thing that makes sense to me is that when the old power supply broke the motherboard or, i hope not, the CPU got damaged. Has anyone seem or heard of someone having a similar problem? What Should I try? How can I find out if its the mother board or the CPU malfunctioning? Thank you for the help.