This is probably not a great video, but... my laptop just started making this odd vibrating noise. It seems to change a little bit depending on how high the fan settings are. (More details in ...
Acer Nitro gaming laptop fan cleaning and repasting
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Acer Nitro gaming laptop fan cleaning and repasting
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Acer Nitro 5 AN517-52 AN515-45 AN515-55 AN515-57 Cooling Fan
Wireless, Audio, Thermals, and Software - The Acer Nitro 5 Gaming Laptop Review: Absolutely AMD - Ryzen Plus Polaris