Acer Nitro 5 laptop, annoying slight buzzing sound coming from right fan

[wizer53]

The other day I opened the computer to clean it. I cleaned it for the first time and then turned it off. Then I noticed an annoying buzzing sound coming from the CPU fan on the right when it was spinning in low power. However, when I lift the laptop and turn it to the right or left, this sound disappears. I turned it on again but I can't solve the problem

 

[Colif]

I would suggest asking on here

Laptop Tech Support

forums.tomshardware.com