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Squealing, scratching, grinding, or groaning noises

Use the information in this section to troubleshoot squealing, scratching, grinding, or groaning noises from a power supply or fan module.

Action​

Remove the power supplies and fan modules one at a time. If the noise stops, replace the power supply or fan module that you just removed.
Note
When you remove and replace the power supplies and fan modules, these events will be displayed in the event logs.