I went to turn my computer on today and it gave a long ~5 second beep shortly after powering up. The monitor was completely black too. The weird thing is, I turned it off for a few seconds, tried again, and everything worked fine. Is this just a "glitch" or should I be looking for something in particular that might be causing a problem? I'm not sure what one long beep indicates but I'm thinking it might be video since the display never came on.