Odd high-pitched noise?

jknight8907

macrumors 6502a
Original poster
Jun 14, 2004
802
42
Hudson Valley NY
My 13" Macbook Pro has started making an odd, high-pitched noise, kinda like one of those 'mosquito' ringtones. It's pretty quiet so I can only hear it at night when the computer is beside my bed on the nightstand. However it's odd in that, it's always present UNLESS I scroll in Firefox. As long as I'm scrolling in Firefox, the sound stops. Crazy. It seems to be coming from the left side of the computer. Any ideas? Thanks :confused:
 

Benjic

macrumors regular
Dec 7, 2007
186
0
Madison, WI
If the noise goes away when you scroll, it's your CPU idling, it's a known issue with Intel CPU's. Best thing to do is to get used to it.
 
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Lucbert

macrumors regular
Dec 8, 2008
208
0
As far as I know all Intel Core 2 Duo Processors have this "problem".
If it really bothers you, you can try to but some load on your CPU in order to get it out of idling state.
This can for example be archived by starting photobooth.
But keep in mind that having load on you CPU will reduce battery life.
 
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