What cause the cpu fan from not spinning

[ivzben]

Hello,
My CPU fan or processor fan is not spinning anymore. I want to know if that is the cause why my computer automatically shutdown after 10-15seconds?

 

[GhislainG]

Does it spin if you connect it to a different header? Not all computers shutdown when the fan doesn't spin; it depends on the motherboard and the BIOS settings.

 

[purple stain]

It's possible it's shutting down because of heat.Their are fail safes in the BIOS that will shutdown the computer if it reaches a certain temperature.

If then fan is old it might of just died.Or the bearing went bad.