13 inc MBP whine

Discussion in 'MacBook Pro' started by illibball087, Nov 11, 2009.

  1. illibball087 macrumors regular

    Jul 27, 2009
    my macbook keeps making this electrical whine noise around the upper left hand corner does anyone know what this is or how to fix it?
  2. harperjones99 macrumors 6502

    Nov 3, 2009
    Does it do it all the time (when nothing is plugged in...no power, devices anything)? If its always no matter what I have no idea but I have had bad cables or connectors make weird things happen.

    If it doesn't do it when on battery only with nothing connected I would plug things in one at a time and try to track down the culprit.
  3. cababah macrumors 68000

    Jun 11, 2009
    SF Bay Area, CA
    This has been posted a lot. I think it is normal.
  4. Ann P macrumors 68020

    Jun 29, 2009
    I believe its the built-in motion sensor that these MacBooks have. My laptop was doing the same thing until I read up about it.
  5. harperjones99 macrumors 6502

    Nov 3, 2009
    So it stopped then? What did you do to make it quit or did it end on it's own? You kind of left the OP hanging.
  6. Morn macrumors 6502

    Oct 26, 2005
    It's the voltage regulation circuitry. On some units it's louder than others, but put your ear next to the magsafe connector when it's plugged in and you should be able to notice a hiss on any Macbook.
    But if this is loud enough to bother you it's probably a flaw.
  7. m85476585 macrumors 65816

    Feb 26, 2008
    The magsafe, CPU power circuitry, and LCD circuitry can all make noise. For CPU noise you can try a program like QuietMBP that keeps the CPU at at least 1% use to try to suiet it. I also wrote a python script you can try that should do the same thing (search for python in posts by me). For the Magsafe there is not much you can do, some noise is normal, and mine has started making more noise with age. For the LCD, try changing the brightness. There used t be a problem with the bootcamp drivers that made the LCD noisy under Windows.

    Try isolating any devices you might have connected (unplug everything, does it still make noise?), and minimize the length of any cables you might have since they can act as antennas and pick up noise (or radio signals, in the case of my rear speakers one time). You could try adding ferrite beads to everything, but I doubt they will do anything since they are mostly for high frequency noise (in the MHz range, which you can't hear).
  8. Ann P macrumors 68020

    Jun 29, 2009
    Sorry about that. It's pretty much on-going. This seems to happen whenever I lift my Macbook off a surface. It's a "click" sound.
  9. MrCheeto macrumors 68030


    Nov 2, 2008
    Dudes...every time I hear this chatter it erks me because this is actually a case with every notebook I've ever touched...ever!

    What does every computer have in common? In the heart of it is what's called a Central Processing Unit that processes away all your Youtube comment wars and bouncy anime chicks. And when you're doing evil sinful things like this, that Central Processing Unit simply weeps like Clay Aiken when he heard the news about Gianni Versace...so cut it out!

    Seriously folks, open an application or scroll down a big intense sight like eBay and listen to it kick-up from idle for moments, it explains it all.
  10. Chupa Chupa macrumors G5

    Chupa Chupa

    Jul 16, 2002
    If you mean a high pitched buzzing sound that changes as you modulate brightness it's most likely a bad inverter board. I've had a couple of those in past PB/MPSs. Very annoying. Make an appt. w/ a genius to look at it & they'll send it in for repair.

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