Resolved Screen dims and brightens on its own while in use

Discussion in 'MacBook Air' started by res.ipsa, Jul 22, 2015.

  1. res.ipsa macrumors newbie

    res.ipsa

    Joined:
    Jul 12, 2015
    Location:
    San Diego, CA
    #1
    Screen on my MacBook is adjusting the screen brightness while it is in use.

    This is NOT the screen auto-dimming because it hasn't been touched. This is my screen getting brighter or dimming as I type this post. I can't seem to identify a pattern of when this is happening and it's driving me bananas!

    I did a search but just found half lit screens. This is the whole screen dimming/brightening while in use.
     
  2. motrek macrumors 68020

    Joined:
    Sep 14, 2012
    #2
    Sounds like the power electronics for the screen backlight are on the fritz. I would record a video of the problem and then take it to an Apple Store (in case you can't reproduce the problem at the store).
     
  3. Significant1 macrumors 6502

    Joined:
    Dec 20, 2014
    #3
    Is it with power-adapter connected?

    There is a setting under power saving, whether it should dim the screen on batteri. So your power-adapter setup might have a loose connection and then your typing is causing it to momentarily run on batteri, due to vibration.

    Try un plucking the power and see if it stops changing brightness while on batteri.
     
  4. res.ipsa thread starter macrumors newbie

    res.ipsa

    Joined:
    Jul 12, 2015
    Location:
    San Diego, CA
    #4
    Significant1, thank you for the reply. It seems to be happening when I am on battery. It doesn't dim then go black (like it does when it is idle). It dims on and off sort of like an ebb and flow. It is so strange! I am waiting for it to happen again. Yesterday, I was working on it from about noon until 10pm, plugged in toward the end and it was fine. I didn't have it plugged in when I was home and it was dimming randomly while I was working on it. At first I thought it was because I was reading a long pdf but then it kept doing it even when I was actively clicking and typing. It's only 10 months old but it seems as though I may have to take it in... Ugh.
     
  5. res.ipsa thread starter macrumors newbie

    res.ipsa

    Joined:
    Jul 12, 2015
    Location:
    San Diego, CA
    #5
    FIXED! I looked around the settings some more, found the problem and verified it when I found others with a similar issue. (I was searching "dimming" when I should have been searching "brightness" LOL) Apparently it automatically adjusts to light. So when I was in the library all day it was the same light and everything was fine. In my room it was adjusting to the pockets of light and shadow as I was moving around.

    :apple: > System Preferences > Displays > Automatically adjust brightness

    Thanks for the help guys!
     
  6. adrianmach macrumors newbie

    adrianmach

    Joined:
    Jul 3, 2017
    #6
    --- Post Merged, Jul 3, 2017 ---
    this worked for me. Stopped the auto adjusting.

    Thanks
     

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