[zenloof]

Recentley, if I'm sitting in a quiet room, I can hear that the processor (im guessing) is producing a high pitched sound as it processes. If it's sitting idle it makes no noise, but if I click on something and it has to complete a task I hear the high pitched sound. Has anyone had this issue?

(P.S. I muted the speakers and the sound continued.)

[Chuckit]

Probably the fan coming on.

[Travis Keller]

The hich pitched sound when you are using the computer is the harddrive accessing information from the programs.

[ibook_steve]

No. You are hearing the high-pitched squeal of a power bypass capacitor. When the processor uses more power like when it is processing, caps that are a little out of spec can squeal. There's not much you can do about this, short of a logic board replacement, but it's usually not loud enough to annoy.

Steve