Blackbook: VERY loud, fast fan!

Discussion in 'MacBook' started by aaquib, Oct 29, 2008.

  1. aaquib macrumors 65816

    aaquib

    Joined:
    Sep 11, 2007
    Location:
    Toronto, Canada
    #1
    I bought a used Macbook yesterday. It was working great under Tiger yesterday and even Leopard today, but just about 2 minutes ago, the fans have been super loud and going extremely fast. I only have Finder, Mail, Safari, and iTunes open. No disc inside. Plugged in I have the Magsafe, my iPhone, an external HDD, and speakers. Any idea why this is happening?
     
  2. Lurchdubious macrumors 65816

    Lurchdubious

    Joined:
    Oct 15, 2008
    Location:
    Texas
    #2
    Maybe restart it? Happened to mine a couple times, but mine's 2 yrs old with most of the memory taken up cuz I was too lazy to delete stuff...
     
  3. Big-TDI-Guy macrumors 68030

    Big-TDI-Guy

    Joined:
    Jan 11, 2007
    #3
    My first guess? You just reinstalled - so Spotlight is re-indexing the drive, and this uses up system utilities and generates more heat than when the computer is idle.

    Obviously make sure it's not on a carpet / blanket or other insulating surface that will be obstructing air flow or keeping heat in.

    Open up your Activity Monitor and see how much CPU is being used.

    If it's well used - check that the fan is clear of dust / debris. Blow compressed air into the intake / exhaust ports. Not many people truly understand how poorly an dusty heatsink transfers heat compared to one that is clean. (the fan will have spin faster to achieve the same level of heat transfer) Not to mention, blocked fans start to cavitate, and spin faster just because there is no air to move. Laptops tend to have VERY small fans, so be careful not to over-spin the fan when blowing into the fan port. (use quick short bursts to prevent it from over spinning / breaking)
     
  4. aaquib thread starter macrumors 65816

    aaquib

    Joined:
    Sep 11, 2007
    Location:
    Toronto, Canada
    #4
    Ok, so it just stopped about 30 seconds ago. I was freaking out, it was unbearably loud. About 70% of the processor is idle, and the MB is on a desk. I really hope it was just spotlight and that never happens again. It was much louder than when I put a disc in the drive.
     
  5. aaquib thread starter macrumors 65816

    aaquib

    Joined:
    Sep 11, 2007
    Location:
    Toronto, Canada
    #5
    And after watching an HD video on Gametrailers, the noise is back..
     
  6. Big-TDI-Guy macrumors 68030

    Big-TDI-Guy

    Joined:
    Jan 11, 2007
    #6
    It sounds like spotlight was indexing then. It typically happens on a new install.

    Still happening every time you tax the cpu moderately? Blow out the dust.

    It could also be the new os is harder on your cpu than Tiger was. I'm not sure how much more hardware intensive Leopard is compared to Tiger.

    For the record, I like Tiger a LOT better. But my applications no longer support it. :(
     
  7. brad.c macrumors 68020

    brad.c

    Joined:
    Aug 23, 2004
    Location:
    50.813669°, -2.474796°
    #7
    My wife's new white MacBook did the same thing when we were playing with iChat video conferencing. Fans revved up quite noticeably.

    Didn't stop us, though ;)
     
  8. aaquib thread starter macrumors 65816

    aaquib

    Joined:
    Sep 11, 2007
    Location:
    Toronto, Canada
    #8
    It still just randomly happens for a few minutes. Is it possible it's because my HDD is 7200rpm?
     
  9. macbooker15 macrumors 6502

    Joined:
    Jan 19, 2008
    Location:
    Hello! I'm over here!
    #9
    I hate the fan on my Whitebook. It revs up anytime anything is done.:(
     
  10. aaquib thread starter macrumors 65816

    aaquib

    Joined:
    Sep 11, 2007
    Location:
    Toronto, Canada
    #10
    This is really starting to piss me off. It's happened about 5 times today and right now it's hard to hear what's going on in The Office because the notebook is SO LOUD. Is a repair required?
     
  11. Big-TDI-Guy macrumors 68030

    Big-TDI-Guy

    Joined:
    Jan 11, 2007
    #11
    The fans will rev up any time there is an increased load. They are temperature controlled, so they will ramp up when needed.

    I'd suggest trying SMC fan control - and moving up the minimum speed a bit. It'll always be a little louder - but it will run continuously - preventing the buildup of heat - and will not cycle as loudly as it does right now.

    Otherwise - ? I dunno.
     

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