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#1
chassis fan starts when waking up
I have a Dell Vostro 200 that has a loud chassis fan. When I wake-up the operating system by moving the mouse, either Windows 7 or Windows Vista, the chassis fan will usually start. This doesn't make sense because the machine should be cooler while sleeping so it should not need more cooling at this point. I would add that the chassis fan is not running upon boot up or even after hours of continuous use or hours of sleep mode. It's only when coming out of sleep that the chassis fan starts up.
What I usually do to get quiet operation when the fan starts is to shutdown and reboot. I suppose an alternative is to setup so that sleep never happens but that would be wasteful. I have on rare occassions been able to wake up the computer without starting the chassis fan by gently moving the mouse. Unfortunately this is hard to do and there is usually no wakeup unless I more aggressively move the mouse.
The BIOS does not seem to have any settings for the chassis fan. The owners manual does not mention speed control nor thermometers.
Is there an explanation or a better fix to the problem?
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