I built this computer myself. I have been running it for almost a year now. I was using it today and while I was in Firefox with 4 tabs open, it froze. I turned it off by holding the power button down for 5 seconds. When I tried to turn it back on, it didn't work. When I turn it on, I hear the fans running, the CDrom turns on, I hear the hard drives start to work (although they don't sound as they usually do) and even the video card's fan is running. While all this happens, the monitor still stays off and the computer does not boot. I noticed that the computer does not continue to make sounds as if the hard drive was booting windows, so that indicated to me that it was not a monitor issue.
About 2 days ago, this happened and when I turned my computer off, I unplugged the power to the video cable and turned the computer on and it worked. A message came up telling me that I should check the cable connection to my video card, but windows still opened up. I beleive that must mean I have a built in videocard on my motherboard. Nevertheless, the issue occured after I was able to bypass the Nvidia video card.
Please let me know what I can do to fix this! Thank you.