if the cpu fan is not spinning it will overheat and might cause damage
If its spinning and cooling you may have a problem with eiher the fan its self or the motherboard detecting it not spinning
The first thing to try would be to clear the BIOS . Your board may have a reset button , or you may have to remove the battery for a few minutes .
If that doesnt work then try updating the BIOS to the latest version . If your problem persists then your options are to replace the cpu cooler with an aftermarket model and see if that works
Or RMA the motherboard