logic board replacement = excessive fan noise & overheating

Discussion in 'MacBook Pro' started by kevinmchale, Jan 27, 2011.

  1. kevinmchale macrumors newbie

    Jan 27, 2011
    I recently had my 2008 Macbook Pro's logic board replaced at the Apple store after the graphics card failed. They replaced it for me free of charge as the graphics card is known to have a higher than usual failure rate.

    I was very pleased to have this part replaced free of charge as my computer was out of warranty. However, my fans now run at full speed all the time (around 6000 RPM) and my computer runs hotter than normal. It has even shut down a few times on it's own; which scared me.

    I checked the thermal sensors to see if Apple had neglected to properly connect them, but they look good. I'm going to replace them anyway to see if it makes any difference.

    What else can I do? I don't want to bring it back to the store to have them tell me the fan noise and heat is "normal." And I don't want to pay Apple to do something I can do myself.

    Would replacing the thermal paste on the heat sinks help this? What else could I do?

  2. miles01110 macrumors Core


    Jul 24, 2006
    The Ivory Tower (I'm not coming down)
    It might, but it's probably worth giving Apple a call about it first to see what they say.
  3. cloakedpegasus macrumors member

    Apr 13, 2010
    Let's eliminate any possible software issues before we go straight to hardware. You should reset pram, nvram and smc and whatever else associated with them. If you are still having temp issues then I would continue looking at the hardware.
  4. kevinmchale thread starter macrumors newbie

    Jan 27, 2011
    Resetting the pram and smc were the first steps that I took. I have tried a few times, but the problem persists. I have also been checking the activity monitor to see if anything was sucking CPU, but there hasn't been anything out of the ordinary.
  5. Q-chan macrumors member

    Nov 2, 2009
    Boston, MA, USA
    I would go back to the store. If I'm not totally mistaken, you have warranty on the repair, even if they did it for free.
  6. cloakedpegasus macrumors member

    Apr 13, 2010
    I agree. This might even be a law in your state.
  7. kevinmchale, Jan 27, 2011
    Last edited: Jan 27, 2011

    kevinmchale thread starter macrumors newbie

    Jan 27, 2011
  8. AlphaDogg macrumors 68040


    May 20, 2010
    Boulder, CO
    I believe it is a thermal paste issue. Apple usually applies copious amounts of thermal paste, when only a sub paper-thin layer is required. When it is applied in such copious amounts, it becomes an insulator rather than a conductor (of heat). Take it back and tell them it is unacceptable, and you want them to fix it.
  9. docal97 macrumors 6502a


    Jun 28, 2006
    Why even mess around with it yourself? The repair is clearly under warranty, and Apple will fix it for free.
  10. memories2last macrumors newbie

    Mar 11, 2012
    I had my motherboard replaced in January due to the same graphics card issue. I also noticed that my laptop was overheating more than usual and now I have a thin blue line running vertically through the screen which I believe to be my screen going bad. I've also seen a theater appearance a couple of times as well. My hope is that this damage is from the work they did so it will be covered under warranty. Other than the graphics card failing everything was working fine until I put into the hands of a repairman. It's a shame we pay so much for these machines to have them go bad from substandard parts.

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