My fan recently broke. So I simply jus popped another one on. The fan I replaced it with jus has red and black which is obv live and neg but the one I took out has red black and yellow any idea about the yellow ? The fan works great but CPU fan failed error keeps appearing then when I press F11 it says entering setup but still shuts down.any ideas about how to keep it running just to get into the settings and change the CPU fan settings. Would be grateful with any help. Thankyou.