Get in. Laptop doesn't unscreensave when I press a key. Try the power button. Friendly IBM boot screen, two beeps, the words "Fan error", and a power down.
Well, 1-800-IBM-SERV says getting a replacement takes 5-7 business days, but they can usually do it in three. And I guess I still have another computer I can do real work on, if I don't mind being a little short on disk space. So I'm not totally toast, but...
Edit: Manager: "ooh, 'Fan error'. You called the help desk? Okay. Here's a spare laptop, swap the hard drives, off you go." Now if only the previous owner hadn't followed security policies quite so closely...