On Dec 11, 2003, at 8:30 PM, LeftyZ at aol.com wrote: > > I have a G4....graphite perhaps...about a year and a half old....I've > heard > it called "Quicksilver." The fan with the black plastic cowling -- > the one on > the main board (on the door) next to the heat sinks, is making a lot > of noise > after it warms up. > > How can I replace it, or fix it, without taking my computer to a > repair place > and spending an unwarranted amount of money? > I had some luck fixing a similar problem on a quicksilver 733 by removing the fan and adding some teflon lubricant to the fan bearings. Also, make sure that the fan is screwed in firmly, that noise might be vibration due to loose screws.