Just to give you a frame of reference, I've had my iBook about a year now, I use it several hours every day, sometimes all day non-stop, and I can't recollect ever hearing the fan go on. Not once. Clearly the problem is either hardware or memory related. Your hardware, or my memory. Brian On 5/6/03 8:50 PM, "Fran Dollinger" <fran at dollingers.com> wrote: > Also, I can feel air blowing out the back...so, it is the fan > as someone suspected.