old man seeks help again,3 month ago built a new pc for my wife my 3rd build so far,in that 3 months its shut down for no reason but restarted with no probs.last night for no reason moniter screen went black and the cpu fan and exhaust fan both stoped working.still power going to motherboard and the asus gtx560ti graphics card is still running and theres no amber lights showing on mobo.the motherboard is a asus crosshair formula v.i may be thought the cpu fan had failed but two fans that run off mobo are not working as well.so i reckoned this was somthing not right with motherboard.on say that since i built this pc its been one problem after another concerning this motherboard.so before i take it apart and send the motherboard back and replace it i just wondered what sum other peoples thoughts were many thnx folks