* if you have a multimeter, measure CPU Fan Connector pins (usually 3 or 4) to find which one have +12v.? if you measure +12v and good Ground problem is the Fan, if you have another Fan test in same connector see if it spins. If you are Missing +12v at mobo."Cpu Fan Header", this is the problem.. Turn Pc off..disconnect CPU Fan 3 or 4 pin connector from the mobo. Take a look at the wires coming from Fan to Connector, the Black one is the Ground,usually first or last depending orientation, next to Black wire is Red (or Yel) which is +12v line missing he voltage from Cpu-Fan Header at Mobo. with sharp object disconnect this Red wire from the socket by pushing the latch out, pull the wire from the socket and locate any other Fan Header near-by, then add-extend this wire to the next Fan Header and connect to +12v line there (red). Connect Cpu-Fan Connector back to its header with Red Wire Pulled and carried to nearby Fan Header, recomending with series of any diode for back protection.Now turn on your pc and stop worrying about the Cpu Fan anymore.. However Fan speed will be constant since the applied regulated +12v it will be still recorded and reported via other pins connected to Mobo. Whether the problem caused by CPU or Mobo, this is the solution I overcome save me getting new CPU or Mobo..? Hoping people in same situation.. getting CPU-FAN ERRORS due Cpu-Fan Failures..Here is the By-Pass Solution.. Enjoy.. Teknofix-2014