In the new window that opens, look for the s ensores In the list of hardware devices detected on the PC, press the small button > placed to its left to expand it and verify that, immediately below, is the entrance HID V2 Sensor Collection o HID V2 Sensor Collection : Its existence clearly indicates the presence of the sensor for automatic backlight. To do this, turn on the laptop, wait for Windows to start completely, press the key combination Win + R, type the command devmgmt.msc into the text field that appears on the screen and press Enter on the keyboard. To ensure its presence, you can check the product data sheet, the user manual or if the drivers dedicated to sensor management are installed in Windows. This, in particular, allows you to automatically turn on the keyboard only when the surrounding brightness is poor or if you use the laptop in the dark. This could be due to the presence of automatic backlight, a characteristic feature of some Lenovo brand laptops.