Macbook Pro Loud Noise Help!?

Discussion in 'MacBook Pro' started by ecsong187, Feb 14, 2011.

  1. ecsong187, Feb 14, 2011
    Last edited: Feb 14, 2011

    ecsong187 macrumors newbie

    Jan 23, 2009
    So my MB pro is a late 2008 model.
    Randomly when I start up my computer or when I am typing I will get a really loud "whoosh" noise from the left side of my MB. It lasts about a second. it almost sounds like a fan is revving up really high and then it goes away.
    Any idea what this could be? It seems to happen at random times.
  2. falterego macrumors 6502


    Dec 28, 2008
    Southern California
    I had a similar issues on my 2006 MB when I would shutdown the computer with the system temp being high. It was as if the system remembered the last known temp and tried to compensate with ventilation. It would never happen if I waited for the system to cool down before shutting down. It also never happened when resuming from sleep, no matter what the temperature.

    The problem went away when I had the logic board replaced in 2008 to fix a bluetooth issue.
  3. ecsong187 thread starter macrumors newbie

    Jan 23, 2009
    Yea it's weird. My computer isn't acting up, isn't running slow or anything. But this noise is still freaking me out. I can't figure out what is triggering it because it happens at completely random times.
    I hope it isn't the logic board!
    Thanks for the reply
  4. Fubar1977 macrumors 6502a


    Jul 30, 2010
    North Yorkshire, UK
    Maybe have a look at your fan speed in iStat pro or SMC fan-control?
  5. ecsong187 thread starter macrumors newbie

    Jan 23, 2009
    Thanks Fubar I will dl SMC tonight and see what it tells me.
    What speed should my fans be running at?
    Thanks for the help

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