This keyboard has the backlit, if your laptop doesn't support backlit function, the keyboard will work normally except the backlit. DealsJust Now How do I turn off the keyboard backlight in my Dell Inspiron 15 Series laptop? This thread is locked.

With the computer powered off, press the power button.

How to turn on the backlit keyboard for other Dell series?

To Turn On Backlit Keyboard in Dell laptops like Studio/Vostro/XPS/Latitude, “Hold the Fn key and press the Right Arrow key”. The letters on the keys themselves are slightly translucent so the light from the backlight underneath will. There is a small LED lamp under each keyboard key. Actually, if you read the Inspiron 15 Series Quick Stard Guide, you will see the F Toggle keyboard backlight is optional. Click the + sign next to System Configuration. Immediately start pressing the F2 key once per second (if the computer boots into Windows, shut down the computer and try again). With the computer powered off, press the power button.

Dell inspiron turn on backlit keyboard