A couple of days ago, my iMac turned off. By itself. I didn't think much of it at the time. I thought maybe I'd shut it down and forgotten about it.
But it happened a couple more times last night and this morning. Now it dies within a minute or two of starting.
Definitely won't get stuff done this weekend that I was planning. Oh well :-)
UPDATE (2005-11-13): Now it dies within seconds of starting. I'd say the power supply is fried. From a little research it seems to be a known issue. Hopefully the local service place has power supplies in stock and can fix it on the spot.