psu making wierd sound?

my psu was making a wierd sound after i did some cable management and it sounded like this.
After i plugged everything back in to make sure it was connected it doesn't make that sound anymore. Im curios to why this is. ps thats not my pc it is just like the sound it made
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More about psu making wierd sound
  1. Sounds like a piece of tape or airduct sheet scraping the fan. Annoying but harmless.
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