My system was running perfectly for almost a month, and then it suddenly refused to power on. It hung a couple of times at the intel splash screen, and then it finally stopped putting out any video when I tried rebooting. The power LED was stuck on. When I clicked the power button, the fans would spin for 2 or 3 seconds, stop spinning for 2 or 3 seconds, and then start spinning continuously, but I never got any video output or motherboard beeps. I called intel support and they confirmed that all of my hardware should be compatable. They had me remove everything except the processor and power supply. When I booted in this configuration, I heard the 3 beeps that indicate the mobo recognizes the lack of memory--which is supposedly a good sign. I then installed my video card and as I inserted it, the case power LED came on again... When I powered up, I got video AND I made it to the intel splash screen where it hung while displaying post code 50. Rebooting gave me the same code each time. I tried the video card in the 2nd PCIe slot and it hung on code EB. I tried a 2nd video card and it hung with the same code. I am fully stumped, does anyone have any ideas?