Press the F5, F9, or F11 key to turn your HP laptop keyboard light on or off. Some HP laptops need the Fn key pressed with the light key to activate the keyboard light. If these keys don't work ...

What to Know The HP keyboard backlight makes it easier to use your laptop in low-light conditions. You can usually toggle it on with the F5, F9, or F11 key, whichever one has the light icon. If ...

In the case of Apple keyboard, even if set the maximum level of brightness, the keyboard doesn’t light up, but in the case of HP or Dell, you can force it to turn on.

If it is, confirm that you're using the right keyboard shortcuts, buttons, or settings to turn it on. Some laptops like MacBooks use light sensors for backlighting in low-light situations.