I had the same problem with my power supply fan. I opened it up, (blow out all the dust while you\'re in there) removed the fan and found that there was a sticker covering the shaft. I peeled that back to get to the bearing. A drop or 2 of oil and I replaced the sticker. (a piece of tape will also work) Since this little fix-it the fan has been quiet for 3 years. I could have just as well replaced the fan, but I\'m one who likes to keep things running and some jingle in my jeans.
