Isn't the fan and some other hardware controls accessible by pressing F2, or another F key prior to startup? I once had a desktop fan do this, it gave a warning, but it was outside of the OS where I had to run the test on it. It was a CPU fan that was inoperable. There are boot CD's, such as Ultimate Boot CD, that may have some testing functions on it. I may be wrong here, but the fan is controlled by a heat sensor that is outside of the OS. That's what I was told over the time I had trouble, I reinstalled to no avail. The seller refunded my money over the issue.