Fans on my Quad get out of control

This is the second the fans in my quade start spinning irregularly. I put my computer to sleep and the fans started spinning really fast and made lots of noise. None of the buttons or keys would wake up the computer. What is causing this?

Hi there.
When fans spin-up fast it usually means your system is having trouble with something & the fans will spin fast as a default.
Have you added anything new to your system, or even something a bit out of date - old drivers etc?
Have you tried all of the standard maintenance stuff, permissions, daily/weekly/monthly scripts, single user mode (fsck), PRAM reset, PMU Reset, open firmware reset etc? If you have try your Apple Hardware Test CD or invest in Disk Warrior or Tech Tool to analyze your system.
You could try booting from a different volume/drive like the Install CD (dunno if you can sleep a Mac on Install CD though) to see if its your copy of OSX or your Mac's Hardware. Or even boot in Safe mode (hold shift Key at boot) to start-up on just a basic system.
Hope some of this helps.
Rory

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