Antec 900 II with all the blue LED fans.

This is the case that I have. I am having a problem and was hoping someone can help me. All of my fans on the case are working besides one. The upper fan on the front LEDs are lighting up but the fan is not spinning. I cant figure it out for the life of me. The one underneath it on the same front panel is working fine. I dont know what I am missing. Anyone have this case that can help me out? I figured they may be a 4 prong conector that goes into the motherboard but i cant find it and not sure if it exists. Please reply if you know. Thank you