Hello, If the fan on the Kinect is not turning on at all, the Kinect is overheating and turning itself off. It is possible you may just need to add fresh solder to the fan connector on the PCB. I didn’t want to cut the wires and I found another post from a user mentioning this. I used a fine tip soldering iron and added some solder to each of the four connections and that’s was it, the fan is turning on now. Here’s the post. I don’t want take the credit just spread the word. Good luck for anyone reading this. Where to buy replacement fan for Xbox one Kinect