One of my fans was making a rattling noise. I cleaned it out really good cleaned out the inside of the computer blew out all the dust outside etc, still rattling. these fans don't have a little reservoir that you usually find behind the sticker but you can pull the little motor out and put a drop of oil be careful Go slowly don't get it on the circuitry. I put a drop in each one I don't have any rattling noise anymore.
13 сен 2023