Yoga 2 Pro yellow color BIOS fix now available!

Discussion in 'Lenovo' started by mitchellvii, Nov 15, 2013.

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  1. peteristhegreat

    peteristhegreat Newbie

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    After doing the BIOS update and the Energy Manager Update, you have to change adjust the Energy Manager to high performance mode for it to take effect.

    (You can get to it by the little black battery icon in the system tray.)

    energy-manager.jpg

    Then after the tutorial windows, go to the rocket icon on the far right, and ta-da, the yellow looks a lot better.
     
  2. Jeff44

    Jeff44 Notebook Enthusiast

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    I did the two updates and now think it may have been a mistake. Even on high performance mode I don't notice a difference in the color yellow (though the yellow problem never bugged me to begin with). However, the changes I made seem to have affected the brightness range of my screen. Seems like the middle range of brightness is much less bright than it used to be; I used to keep my brightness around 40-50%, but that now seems way too dim. I now go prefer it around 80-100%. Am I wrong or is the upper limit much lower than it used to be? I also found something else that, even though it is not a negative, seems to confirm that the brightness range is different than it used to be. Prior to the updates when I would turn the brightness all the way down the screen would actually turn off. This was something that wasn't necessary and prompted user complaints (there is a screen off button if you need that function) but it seems to confirm that the new BIOS update changed the brightness range. Am I wrong on these issues, that the screen is now less bright? I didn't get a fix for the yellow and now I like my brightness range less. Can I go back to the previous BIOS version? If so, how do I do that?

    In case it matters, when I installed the new BIOS the keyboard light stayed on for a long time (left it more than 10 minutes) and I thought I should not hold the power button because the computer was still on (screen was black but on and computer was running). After a long time I figured I was at the point where I needed to hold the power button down for 8 seconds as some instructed. In the instructions people seemed to indicate that the screen and the computer were both off and just the keyboard was on so I want to make sure I didn't make a mistake. Thanks for the help.
     
  3. lead_org

    lead_org Purveyor of Truth

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    the update didn't really improve the yellow colour profile all that much. But given the battery life of this machine even at 70% brightness, i think it is a tradeoff that i am prepared to pay.
     
  4. mstrmdr

    mstrmdr Newbie

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    Same here. No change in yellow color and system info shows BIOS Version/Date Lenovo 76CN38WW, 6/27/2014
     
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