How to Fix Keyboard Backlight not Working on Mac/Windows

A backlit keyboard is highly beneficial when you often work till late at night. It doesn’t disturb the sleep of other people sleeping in the same room. Moreover, it allows you to work with great comfort while sitting in dim room light. Sometimes, the backlight of the keyboard doesn’t work due to some reason and you face great problems while typing. Even it doesn’t work when you try to enable the backlight manually. It shows like the feature isn’t working or the feature is disabled.

Well, there may be various reasons for this problem. Let’s have a look at all of them and their fixes.

Method # 1: Use the Relevant Keys

You can switch the backlighting function on or off by using the relevant keys to know whether they are working or not.

  • Press “Fn + Spacebar” to switch the backlights on/off.

Method # 2: Uninstall Recently Installed Software

Sometimes, a recently installed software interrupts the functioning of keyboard backlights. So, uninstall a recently installed app/tool to check whether it’s the true reason behind the error.

  • Go to the “Search” and type “Control Panel” here.

Search Result

  • Now, select “Uninstall a Program” from the Programs category.

Programs category in control panel

  • Now, select the corrupt program from the list and click “Uninstall” to remove it from the system.
  • Reboot the system and see if it fixes the error.

Method # 2: Adjust the Light Sensor

Sometimes, the bright light or sunlight directly touches the light sensor on the Macbook Air/Pro. Resultantly, it brightens the indicator and the controls are disabled. To fix this error, you need to adjust the Mac manually so that the sunlight or bright light doesn’t touch the front-facing camera. Remember, it’s not a bug. It’s only due to an external light that disables the backlighting feature automatically when the backlight is not required. It also happens when you use the MacBook in the sunlight.

  • Simply, check the light sensor and the angle of the lighting source.
  • If the lighting source is touching the light sensor, keep it away from the direct light.

Method # 3: Control the Key Backlighting Manually

If the above method doesn’t work, control the keyboard backlight manually. Use the steps given below in this context.

  • You can manually control the backlight by using the System Preferences menu.
  • Press Apple’s logo button from the keyboard. It will open the “System Preferences” menu.
  • Now, uncheck here the option “Illuminate the backlight automatically in low light.”
  • Use the F5 and F6 keys on the keyboard to manually control the illumination level of the light.

That’s it guys! it will fix the error permanently.

Method # 4: Reset the SMC

If the error persists, you must reset the SMC to fix this problem. It’s basically the System Management Controller. When you reset it, most of the things get back in order.

  • Reboot the Macbook.
  • Keep pressing the Ctrl + Alt/Option + Shift keys.
  • Hold these keys for a few seconds, then press and hold the power button too. (If the system is on, it will turn off when you hold these keys.
  • Now, keep these keys pressing for 7 seconds. Then release them concurrently.
  • Wait for a few seconds, then press the Power button to turn on the Macbook.
  • It will restart now and the SMC will be reset automatically.

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