I am in need of some help here... I recently went on vacation so before doing so I turned off my computer, when I got back I hit the power button and nothing happened. My optical mouse wasnt even blinking. So After a while of playing with the switches and such my optical mouse was flickering again after I turn the switch off and on and I noticed the keyboard light up (the num, cap, and scroll lights) but the computer will still not power on. This did happen to me last year after I had went on vaction I had shut the computer down for about 3-4 days and the same thing. Nothing turned on, after about an Half hour of playing around with it, it finally went on. I have shut the computer down for 1-2 days and it has powered on fine but for some reason if its not on for a long period of time it seems not to want to go on. I knew I should have not taken the chance and left it running but I dont understand why it would do this. My computer is AMD Semperon processor at 1.8 ghz and it was a bare bones system I had bought on ebay and besides this issue has worked fine for the year and half i have had it. The power supply is a 400w supply and looks failrly new. I even unplugged the power supply cord to the mother board and plugged it back in to see if it was loose, dirty and still got nothing. Any suggestions would be greatly appreciated.