Windows 8 and 8.1 Forums

Windows 8.1 laptop can no longer adjust brightness.

  1. #1

    Posts : 1
    windows 8.1

    Windows 8.1 laptop can no longer adjust brightness.


    I have had an Asus laptop with windows 8.1 for almost two years. Two days ago, I found that I can no longer adjust the brightness. When I use F5/F6 the brightness bar goes up and down between two levels but the screen brightness isn't changing. This has happened before but fixed itself within a day. This doesn't seem to be happening this time. I have checked some solutions to this problem but most people seem to have this problem after an update or upgrade to windows 8.1. This is the same operating system I have been using for two years and, as far as I can tell, there has been no update in the last week. I've checked the drivers and there doesn't seem to have been a recent update.


      My System SpecsSystem Spec

  2. #2

    I can only tell you what happened to me when I ran into the same problem. First, my Toshiba notebook limits the display brightness whenever I am running on battery. This is because full brightness runs down the battery much faster.

    So, assuming you are running with the charger connected, make sure you didn't accidently activate/enable some "Eco" mode. This is what I did once and didn't realize it. Eco mode dims the display and prevents manual adjustment. On my Toshiba, there is a special button I must have accidently brushed across or pressed. On other notebooks, I have seen similar functions controlled by a Fn + F-key combination. So you might check your manual to see if something like that didn't happen.

    Otherwise, your monitor could be failing. Let's hope it is not that.
      My System SpecsSystem Spec

Windows 8.1 laptop can no longer adjust brightness.
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