Odd high-pitched noise?

Discussion in 'MacBook Pro' started by jknight8907, Nov 19, 2009.

  1. jknight8907 macrumors 6502a


    Jun 14, 2004
    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:
  2. Benjic macrumors regular

    Dec 7, 2007
    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.
  3. Lucbert macrumors regular


    Dec 8, 2008
    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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