The X5 fan does not turn. First check whether the power interface of the fan is loose or not. If there is noise, check whether it rubs against something else. If there is nothing wrong with the power port or anything else, then the fan itself is broken and needs to be replaced. If you need a replacement fan, please contact  service2@thinkrider.com  and we will provide you with a new fan. You can learn how to do it in the video below.
X5 fan replacement video: https://youtu.be/_l5dMc-crZ4