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  1. KLX007's Avatar
    Hello everyone ,
    my Lumia 640XL LTE (Windows 10) is not opening the
    adjust brightness setting.When I upgraded my phone to
    Windows 10,at first it worked but after 1 -2 months it
    became non-responsive, I mean I push it a hundred times
    and it does nothing.
    NOTE : The Windows 10 update was official, not from the insider programm.
    Settings > Extras > Display (is doesn't even open).
    The phone has no other problems ,but that one is really
    annoying.
    Please give me your advice, I don't want to reset it .
    Thanks in advance
    Last edited by KLX007; 05-25-2016 at 07:14 AM.
    05-25-2016 07:04 AM
  2. v535's Avatar
    Did you hard reset your phone after upgrade process? Or else you could check for updates in store. How about long tapping brightness quick action tile in action center?
    Last edited by v535; 05-25-2016 at 07:49 AM. Reason: Fixed a Typo.
    05-25-2016 07:48 AM
  3. KLX007's Avatar
    Did you hard reset your phone after upgrade process? Or else you could check for updates in store. How about long tapping brightness quick action tile in action center?
    No I didn't hard reset it. It won't work whatever I do.The Low - Medium - High works ...but I want to change the levels for each one.
    05-25-2016 08:15 AM
  4. v535's Avatar
    No I didn't hard reset it. It won't work whatever I do.The Low - Medium - High works ...but I want to change the levels for each one.
    You always need to clean install, because leftover config files creates confusion for OS, so as to which version to load up and process. IMO, hard reset via settings app. You'd lose all your apps and settings. After reset, start from fresh.
    05-25-2016 08:41 AM
  5. KLX007's Avatar
    You always need to clean install, because leftover config files creates confusion for OS, so as to which version to load up and process. IMO, hard reset via settings app. You'd lose all your apps and settings. After reset, start from fresh.

    So if I hard reset it ,you think it will be working fine ? Another question if I hard reset it will it go back to Windows 8 or it will remain at Windows 10? Thanks
    05-25-2016 08:49 AM
  6. Maurizio Troso's Avatar
    So if I hard reset it ,you think it will be working fine ? Another question if I hard reset it will it go back to Windows 8 or it will remain at Windows 10? Thanks
    An hard reset reinstalls last downloaded build. WDRT via pc instead reverts phone to fabric build
    Last edited by Maurizio Troso; 05-25-2016 at 10:55 AM.
    KLX007 likes this.
    05-25-2016 10:18 AM
  7. v535's Avatar
    So if I hard reset it ,you think it will be working fine ? Another question if I hard reset it will it go back to Windows 8 or it will remain at Windows 10? Thanks
    Hard Reset by going to settings app > About > Reset Device click yes and you'll reverted to current w10m build w/o any apps and settings.
    05-27-2016 11:49 AM
  8. KLX007's Avatar
    Thank you guys . Guys the reset seems to have solved the problem. :)
    05-28-2016 03:54 AM

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