At 09:17 -0400 30/4/04, Peter Krug wrote: >loud whining noises coming Peter - there were three noise sources in my Ti500: 1. the whine of the CD drive when there was a CD in it (the drive failed and was replaced quickly by Apple and then there was no noise) 2. the loud cooling fan (I think there was only one, not one related to the hard drive) 3. the hard drive. When I replaced the drive, all of this sound was eliminated. (I still have the drive, now in an external drive case, and it still whines) From what you describe, it is not sure to be coming from the hard drive. To be sure, can you not take out the hard drive, and start up from a CD, and then you can be sure if it is the hard drive. I could tell from the location and type of noise, I never needed "proof". Trevor