Lenovo Legion Y520 - Keyboard light - on and off - YouTube
How to check if a PC is configured with backlight keyboard and how to turn it on or off - Lenovo Support US
New Lenovo Legion Y520-15IKBA Y520-15IKBM Y520-15IKBN Keyboard Backlit US | eBay
With lighting, without frame, German keyboard for Lenovo Legion Y520-15IKBN (80WK00T5GE), Y520-15IKBM (80WK01DWGE), Y520-15IKBN (80WK00T6GE) : Amazon.co.uk: Computers & Accessories
How to turn on the keyboard light on the Lenovo Legion Y520 - Quora