Display Question

Discussion in 'MacBook Pro' started by DELLsFan, Apr 24, 2009.

  1. DELLsFan macrumors 6502a


    Jan 6, 2009
    Hi folks -

    I use my MBP connected to an external display. From what I've noticed, the display on the MBP appears to be turned off when following the direction here:


    I've also noticed than I can effectively turn off the display on the MBP by toggling down brightness to it's minimum setting.

    My question is ... does toggling down brightness of the display really power down the display (cutting off the fluorescents on this mid 2007 model)? It seems to. Or is it simply attenuating the signal such that it appears to be off? I notice that when fully toggled down, the screen goes completely black and there is no discernible heat or light emanating from the display.

    The distinction between the two situations above involves heat dissipation during my encode sessions. Using a powerful, external fan, I can keep my CPU temperatures lower with the lid open. :)

    My goal here is to maximize the life of the laptop by actually keeping the display off to save energy and wear - since I prefer the external display, and keeping system temperatures as low as possible during full load.

    Any thoughts? :apple:
  2. Illicit macrumors 6502

    May 14, 2007
    Waterloo, ON
    Even with minimum brightness, if you look closely, you can still make out discernible objects.
    However, keeping the brightness down, and turning off unnecessary services (wireless, bluetooth etc) will prolong the life of the hardware.
    BUT, your graphics card will still be running, and your display will definitely outlive your graphics card naturally no matter how protective you are of it.
  3. DELLsFan thread starter macrumors 6502a


    Jan 6, 2009
    Wow ... I'll look a little closer at the screen. I could swear it looked (and acted) a lot like it was off.


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