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Windows 7: chassis fan starts when waking up

29 Apr 2012   #1
broiyan

Windows 7 Professional 64 bit
 
 
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?


My System SpecsSystem Spec
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29 Apr 2012   #2
A Guy

Microsoft Community Contributor Award Recipient

Windows 7 Home Premium x64 SP1
 
 

I found this thread in the Dell Forum

Vostro 200 fan Noise at startup - Desktop General Hardware Forum - Desktop - Dell Community

They all point towards a certain BIOS version ( v1.0.8), a downgrade to the previous version seems to have fixed this for some. But also say the fans definitely spin up upon startup, but are supposed to slow back down after a few seconds.

A Guy
My System SpecsSystem Spec
29 Apr 2012   #3
broiyan

Windows 7 Professional 64 bit
 
 

That was an excellent tip, thanks. I upgraded to BIOS version 1.0.16 and that fixed the problem.
My System SpecsSystem Spec
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29 Apr 2012   #4
A Guy

Microsoft Community Contributor Award Recipient

Windows 7 Home Premium x64 SP1
 
 

Great, glad you got it sorted

A Guy
My System SpecsSystem Spec
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 chassis fan starts when waking up




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