My aluminum 2.8 Ghz iMac's three fans have been running continuously for about a week now. I've tried shutting it down overnight and resetting the SMU myself, but nothing even slows them down. The moment I turn it back on, they all start up. It's not running hot at all, no more than 41 celsius even when a lot of apps are running. Any ideas on how to fix this? But my main question is, will this hurt anything? Fans used to run continuously on computers without "burning out" or going bad or failing or anything. It's going to be incredibly inconvenient for me to get this to an Apple dealer, so I'm considering just putting up with the noise for a while. Any harm in that? Thanks.