so, here's the deal... i finished rebuilding my computer a couple of months ago and have started having this problem just recently. when the computer's on, it'll just randomly shut off and half start back up. it seems like everything's spinning up, but doesn't sound the same (if that makes any sense) and the monitor's blank. I can't shut the thing off with the power button either, i have to disconnect the power cord from the power supply. if i wait for a few seconds and reconnect it, i can turn the computer on, but the monitor's still blank. the drives spin up and the fans turn on, but the monitor's not showing anything on the display... I was thinking that it's a power supply issue, maybe, but a 500W power supply should be enough... i'm running 2 CD drives, 2 IDE HDDs, and the other normal stuff (case fans, cpu, video card, etc.) it happened yesterday and last night, it still wouldn't work... so i unplugged everything, moved it to the top of my desk and took off the side panel. i checked to make sure that everything was properly connected inside the case, which it was, and when i tried it again, it worked anybody have any experience with this? or any ideas what i can do?