It will randomly become bright and then the brightness will go so low that you cant see it without shining a bright light on it. Please help.

  • Do you have a screen protector on? (It might interfer with the ambient light sensor). Have you tried to disable automatic brightness level and adjusted brightness manually? According to this post forum.xda-developers.com/showthread.php?p=41684706 the automatic brightness level stays in a close range of the level set manually. – kirodge Mar 29 '17 at 22:15
  • Can you see the screen light up in total darkness? If not, either there's some settings that fully turned off backlight, or the screen itself (backlight hardware) is defective. – Andy Yan Mar 30 '17 at 1:05
  • Have you selected Adapt to lighting conditions ? If yes, disable it and select brightness manually. – Chandrani Chatterjee Mar 30 '17 at 6:07

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