I will unplug for a longer time and see if that works. And I wasn't using the computer at the time, my brother had left it on. The power did go off a few times today, so yes the power must have gone of while the computer was on, now it won't turn back on. I will try to unplug for a while, how long should I wait? because I have already tried unplugging and plugging back in, as well as turning switch on back off. I don't know if I have surge protection, prolly not because it's not turning on? Some1 built this computer for me. Any other ideas on what I can do?