My Powerbook recently stopped turning it's fan on when it got hot. I mean, in a way this is a good thing for me, because I kept having to put it to sleep when I was in the library and that wind turbine would come on. My only worry is that this could cause damage to the processor or other parts of the laptop. It does feel like it's getting decently hotter than it used to, even under just regular daily tasks like email, word processing, and web browsing. I can't get an exact number on the heat, as there appear to be no sensors inside it anywhere that Temperature Monitor can find. I can however feel heat through the keyboard, which is something that I never used to feel. Do you think the Powerbook could suffer any harm from being used for such light use as listed above for a few hours without a fan? Or should I look into somehow replacing it (if that's even possible)?