Macbook Pro fan making annoying geiger counter noise.

Discussion in 'MacBook Pro' started by yarjarrar, Nov 8, 2008.

  1. yarjarrar macrumors member

    Joined:
    Jul 2, 2008
    Location:
    California
    #1
    Suddenly when I turned my MBP on, I noticed it was making a constant geiger counter noise. I thought it was just the hard drive making its usual booting up noises, but it never stopped. I got an app to control the fan speed, and I turned it up to speed up the fans, and sure enough it got louder, so I know it's the fan. Please help.
     
  2. MacPil0T macrumors member

    Joined:
    Apr 3, 2008
    #2
    I had this happening as well but after revving the fans all the way up for 30 min, it went away. Other people have been getting their machines swapped out for new ones. Check this thread out.
     
  3. yarjarrar thread starter macrumors member

    Joined:
    Jul 2, 2008
    Location:
    California
    #3
    Hey, it worked! I turned the rpm to 6000 and left it for about 15 minutes, and now it's gone. Thank you!!!
     
  4. MacPil0T macrumors member

    Joined:
    Apr 3, 2008
    #4
    Yeah, I think maybe the fan blades are very very slightly too big for the enclosure so maybe this trims a tiny bit off of the plastic. I really have no idea why this fixes it but this at least an option for people to try.
     
  5. fkntotalkaos macrumors 6502

    Joined:
    Nov 24, 2007
    #5
    nope this is the beginning of the end, only goes down hill from there. Mine started to do this and kept getting worse until I finally replaced my right fan. Now my left is going out.:mad:
     
  6. yarjarrar thread starter macrumors member

    Joined:
    Jul 2, 2008
    Location:
    California
    #6
    Really!? That's not good. I only got this computer about three months ago.
     
  7. yarjarrar thread starter macrumors member

    Joined:
    Jul 2, 2008
    Location:
    California
    #7
    By the way, how did you replace it? Did you do it yourself or did you send it into Apple or something?
     
  8. kockgunner macrumors 68000

    kockgunner

    Joined:
    Sep 24, 2007
    Location:
    Vancouver, Canada
    #8
    Are you talking about the unibody ones? My Penryn MBP had this problem, but I simply did the same as you and ran the fans at 6000 rpm for about a minute and it solved the problem. Maybe the fan is off balance and the high revs and the centrifugal force evens it out again?
     
  9. yarjarrar thread starter macrumors member

    Joined:
    Jul 2, 2008
    Location:
    California
    #9
    My model is the early 2008 one.
    And I guess it didn't fix it. It's still doing it. I don't know what to do.
     
  10. strumleroy macrumors newbie

    strumleroy

    Joined:
    Aug 12, 2016
    #10
    Hi all - just wanted to say that i had this exact same 'geiger meter' sound - and when i heard some people saying it was probably the fan having an issue - i didnt think so because it didnt really Sound like a fan noise. BUT wanted to say after taking off the little tiny screws off the back cover of my late 2012 macbook pro - and downloading the SMC Fan Control software and cranking it up to higher rpms manually - you can Immediately tell its the geiger meter sound. What it must be is the Bearings of the fan is going bad. I am going to order both fans - they are actually quite easy to replace at least on this model - just wanted to throw this out there since i have spend a few days looking this up online - and i Really thought there was a serious problem with my macbook - but looks like it will be like a $30 fix.
     

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