I've had this case for about 7 months. I've noticd the fan spinning a little bit strangely for a while, and then stopping. I had to turn up the fan speed on the fan controller to get it to spin again. Now, when I turn the computer on, the blue LED lights are on, but the fan is not spinning. I have not touched it... even when I turn the fan speed on to high, it does not kick-start the fan anymore.
Maybe the fan controller is possibly broken? However, the cable that connects the fan controller is too small to hook up to the board.