I have a Macbook Pro 13" base model. I noticed last night that from time to time I hear what sounds like a slight electrical click noise. After repairing permission, disk verification, etc., which all were normal, I think the clicking is a static noise coming from the speaker or sound system. I finally clicked on the mute sound button and no more static like clicks.....at least so far. When I enabled the sound button I heard the static like click from time to time. I have done all of the software updates. The only unusual thing to report is that yesterday the wifi station at my home wasn't working, and so Iphoto would hang up on me and I would have to force quit until I realized that the computer was constantly scanning for wifi sites, I think. Can't be sure. When the wifi station was repaired there were no problems. Any suggestions?