Hooray, my computer is back from the dead... which, I guess, makes it an undead computer. The graphics card died on me. Its cause of death: succumbing to all the dust that had gathered up in the utterly tiny fan on it. So I had to get a new one... and decided to spring for a hefty bugger, which demanded a new power supply as well. Raising the dead is expensive business, it turns out. Still far cheaper than buying a completely new computer, though.