The fan itself might have shorted out. Try plugging one of the other fans into the CPU fan power 3 pin power connector. Even if its 4 pin you can plug a 3 pin fan into it and see if it spins up..
The fan itself might have shorted out. Try plugging one of the other fans into the CPU fan power 3 pin power connector. Even if its 4 pin you can plug a 3 pin fan into it and see if it spins up..