How to Turn Off or On and Troubleshoot the Backlit
https://www.dell.com/support/kbdoc/en-us/000132120/how-to-turn-off-or-on-and-troubleshoot-the-backlit-keyboard-on-your-dell-notebook-computer
Mar 03, 2022 · To set the Ambient Light Sensor to Enable, perform the following steps: Click the + sign next to Video in the System Configuration menu. Click Ambient Light Sensor. Select Enable. Auto Input Only - The keyboard illuminates when the internal keyboard, touchpad, or pointstick is used. Click Apply, and then Exit. Back to Top
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