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Why does my CPU fan stop spinning after Windows Vista starts?

Why does my CPU fan stop spinning after Windows Vista starts?

It is such a strange behaviour on my Acer Aspire 5720 system running Windows Vista Italian version.

Asked by: Guest | Views: 61
Total answers/comments: 2
Guest [Entry]

"This might be a hardware problem.

Enter BIOS setup, wait a minute or two, and see whether the fan keeps spinning.
If it doesn't, you probably have a hardware problem.
You can also try booting to a CD (eg, Knoppix) and see whether it stops spinning."
Guest [Entry]

My Dell laptop has the same problem. I have discovered the following reason for fan not working. When a CD is already present in the drive , and switch on my laptop, usually the fan wont work. As soon as i remove the CD our of the drive, fan starts functioning.