Mr. Oniya was using his laptop about 15 minutes ago, when all of a sudden, the hard drive spun down (it made that soft little whine) and the screen went black. He was surfing the web and had just attempted to launch Minesweeper. It was running off of house current, so it wasn't the battery running down. (Windows Vista, Compaq, AMD 64 Athlon X2, NVidia - that's all I can remember.)
So far, restarting it brings up the usual indicator lights (connection light around the power port, blue indicator light on the power/sleep button, activity light on the drive), and it sounds like it's spinning up, but nothing shows up on the screen. He's planning on taking it to GeekSquad in the morning (although the protection plan has run out a couple years back), but if anyone has any ideas, I'll be up for a little longer.