|The fan on my CPU was making noise so I replaced it. It was fine for a while then it started making slight noise (got louder) and last night I turned it on and WHRRTHRTHRRRR it sounded like the fan was grinding against something. I quickly turned it off and opened it up. There was some dust so I cleaned it off. I turned it back on, same noise. I unscrewed the fan and held it my hand and turned the power on, and it didn't make noise. I turned it to the left, turned it to the right, held it right side up- no noise. Then I laid it down on the heatsink of the CPU where it normally rests and it started making that noise.|
The fan blades are not sticking out and grinding anything. The fan isn't put in the wrong way (at least, the wrong side isn't down). So I really can't imagine why it's making this noise. Doesn't seem to be making contact in any ill way.