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The fan on my notebook computer runs during the diagnostic test but stops when Windows XP boots up. How do I change the BIOS to fix this problem?

April 26, 2017boots Computer diagnostic fan notebook Stops Test Windows XP

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The fan on my notebook computer runs during the diagnostic test but stops when Windows XP boots up. How do I change the BIOS to fix this problem?

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Since the fan runs under the diagnostic program, I suspect that there really is no problem at all. Under WinXP (and Win200), unless there is a need for cooling, the fans will not turn on. Under WinXP and Win200 if you are just letting the system idle, there will be very little load on the processor and it may not be generating enough heat to cause the fan to turn on. WinXP and Win2000 include a CPU halt routine to idle the processor for both power management and (implied) temperature control also. To see if the fans will turn on, run a program that puts a heavy load on the processor. To get the cpu to 100% usage, open the Windows Calculator and enter a large 15 digit number and then hit the n! key and it will stress the CPU. Note: To see this button, the calculator needs to be in the Scientific View. If the fans are functioning correctly, it should turn on.