What would cause a CPU fan to not power up with the system? I quadruple checked the fan's power connection and it is correct. The fan works when plugged into the fan connection on a Gigabyte motherboard (although I can't get it to POST). Two different power supplies have been tried - both brand new. While the system does not POST, the heat sink is getting warm (I power down within 30 seconds to avoid damage).
I tried MSI's tech support and received a cookie cutter response - absolutely no help.
Just a quick aside, and sorry if this is a necro, but our problem with no fan spinning was that the wires of the fan wrapped around the case of the CPU fan, and rubbed against the fan baldes with just enough resistance to keep it from turning.
This page is the top google hit for "fan not spinning", so I figured I'd throw this in here, in case anyone else has such a solution to their problem.