03-06-2009, 04:52 AM

I have a large imac, aluminium

The whole thing seemed to be running slow, and seemed hot. I shut it down and on restart a fan came whirring on immediately, as soon as the start up button is pushed. I have tried reinstalling operating system, still the same.

I have tried smcfancontrol, but it doesn't seem to even register a temperature or fan speed

I have tried the istats widget thing, and that doesn't register any fans, or at least I can't get it to show anything

Anyone got ideas on what has happened?

03-06-2009, 12:18 PM

Did you try resetting the PRAM? Sounds like the controller that monitors all the temp sensors is out to lunch.