Clicking or rattling noises

Use the information in this section to troubleshoot clicking or rattling noises from a power supply or fan module.

Action

Complete the following steps until the problem is solved:

1. Visually inspect the fan modules and power-supply fans to make sure that nothing (such as a wire or a broken fan blade) is touching the fan blades.
   Important

   If an object is touching or rubbing against a fan blade, be sure to shut down the chassis before you attempt to remove the object.
2. Remove the fan modules and power supplies one at a time. If the noise stops, replace the fan module or power supply that you just removed.