MBP 13" Screeching sound

Discussion in 'MacBook Pro' started by Shinzou, Jul 26, 2011.

  1. Shinzou macrumors newbie

    Jul 26, 2011
    Hello I hope this is the right forum for this!
    A week ago my mbp 13" mid 09 started to make a screeching sound around the qwd-asd keys. This was after my vacation and stupid as I was I didn't check where i sat down and felt the keyboard with my butt, but manage to stand upp pretty quickly (computer and chairs are not a good ide..). Its after that incident that I first started to hear the noise. It could be that the noise was there before but you always gets a little paranoid after this kind of situations...

    Half a year ago I switched to 8 gig ram, but I cant image that the sound would come about 6 month after, so the most logical solution is the incident...

    The noise isn't noticeable when there is sound on or to much background noise (fan full speed for example). But when it is quiet you can clearly hear the sound. It isn't the fan, that I already checked by opening the case and listened to it.
    Due to the lack of apple-care I would appriciate if someone could tell me what it might be or to point in a good direction.

    I have recorded a 13 seconds long sound, unfortunately only with voice-memo in the iphone so the quality isn't the best but you can hear the sound if you listened carefully and ignore the fan in the background.


    Attached Files:

  2. Detrius macrumors 68000

    Sep 10, 2008
    Asheville, NC
    Sorry. I'm at work, so I'm not listening to your file, but if you opened the case and listened to it, where was it coming from? The location you specify is to the left of the fan. The only thing in that area that even can make noise is a speaker.
  3. Shinzou thread starter macrumors newbie

    Jul 26, 2011
    Well I think it is there, hard to fix the exact location. But around there.
    If it is a speaker then, shouldn't it disappear when I shut the speaker of? Because it doesn't do that. I shall try to open the mbp once more and try to locate the sound more exactly.

  4. emiljan macrumors 6502


    Jan 25, 2010
    I have the same issue and i believe its CPU whine. Whenever my computer is idle the noise is there. Do anything resource intensive and the sound goes away.

    If you do a Google search u will finds tons of posts about core 2 duo chips with the whine issue.
  5. Shinzou thread starter macrumors newbie

    Jul 26, 2011
    What you said nailed it. Tested to search for whine instead of screeching and with the quietMBP application that came upp my mbp got silent.

    damn this whining cpu-noise... Cant work anymore in silence due to the sound which drives me mad... :(

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