This is a function, not an error, to automatically turn off the backlight when it is not needed and would not be visible anyway, such as using a MacBook outdoors in the sun.
The solution is simple: adjust your Mac so that the light source no longer shines on the screen and close to the forward-facing camera.
In some situations, direct light, bright lights, sunlight or glare may shine directly on the light sensor of the MacBook Pro or MacBook Air, and when this happens, the display and light controls lock. Then try restarting it and wait until the CPU field is at 0%. If it is a custom CPU field > 0%, a character is easily found by right-clicking on the bootcamp icon in the taskbar, it slows down to open a popup, you simply exit the bootcamp.exe process. If you don’t see the lights, go to the Task Manager and search for bootcamp.exe. Sometimes Windows is updated and the lights may not work. When you connect, you will hear a bing-like sound after bootcamp.exe starts, and the keyboard LEDs will light up. This article will give you a complete solution and explanation of keyboard lighting that does not work on Windows and Mac.
But if you encounter this problem, you can take a look at this message. The keyboard backlight does not work, is a common problem that can occur under Windows or Mac. Update: Stop getting error messages and slow down your system with our optimization tool.
