Question Weird chassis fan noise ?

Sep 11, 2020
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Hello, so i recently cleaned my pc, with airduster, after i was done and plugged in the pc again, i got some weird fan noise. Sounds like a motor/scrapping noise, but it’s not scratching.
 
You'll want to take the fan out to inspect it for an oil hole, typically under the center sticker. You can use a fingernail to check for the depression. Some fans have a little rubber plug you can remove and drop a drop or two of oil in there. No more then 2 drops. Some fans just have a hole covered by the sticker. Some fans don't have a hole in which case you will just need a new fan.