Sorry, dont no so much about computers, but my friend gave me a desktop computer, with Centos installed in it. I hooked up to my tv via dvi to hdmi and worked fine. However i decided to open up the computer and have a play, but didnt unplug. When i started playing, the computer turned on on, then i switched it off. Now it will not boot up at all. nothing happens when i press the power button. Does anyone have any ideas why this might be?