I recently had this problem when I installed a new mouse and keyboard that used USB. 
 Go into the device manager properties for your mouse and keyboard if they are USB 
and go into the power management section and verify that "Allow this device to bring 
the computer out of standby" is not checked.  Any USB device that is set up to bring 
the computer out of standby needs a power source to operate, so the computer leaves 
the power supply in the normal mode, keeping the fans on, and supplying power to 
the usb root hub for the device.  Maybe that helps some of you? 


>I have an FIC AZ11E MB and I am running Win2000. I had to change a BIOS setting 
under 
>power mgt menu that was labeled something like 'fan state on standby' and the values 
>are 'on' and 'off'. Off setting works like a charm. Not sure what MB you have but 
>look at the bios for something like this and it may fix it up for you. FYI- I checked 
>my heatsink with my finger when I made this change to be sure I wasn't cooking my 
>chip and it felt nice and cool. Have been running this arrangement about 24/7 for 
>a month now w/o probs.
>good luck, dave
>
>

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