Keyboard lights are enabled using a specific key or Fn shortcut that varies by brand and model, so checking for the backlight icon on a function key is the first step.
A keyboard backlight is one of those rare features that is wonderful when it works and frustrating when it does not. The difficulty is that there is no universal “on” switch — Apple uses a slider, Dell puts it on the F keys, and HP often hides it behind an Fn combo. This guide covers the exact shortcuts and settings menus for the most common brands, so you can find the right one for your specific keyboard without having to guess.
Check Your Keyboard First
Before diving into system settings, physically inspect your keyboard. Look at the top row of function keys (F1 through F12). Many manufacturers print a small icon that looks like a keyboard with glowing lines, light rays, or a sun on one of these keys. This is your primary target. If you see it, you usually press the Fn key and that key together. If you do not see any backlight icon, your keyboard likely does not have internal backlighting capabilities.
How To Enable The Keyboard Light On A Mac
On a Mac, the process is managed entirely through software. Open System Settings > Keyboard. Here you will find a Keyboard brightness slider. You can drag it to your preferred brightness level.
If your Mac keyboard has dedicated brightness keys, you can also press them directly. You can automate this by enabling Adjust keyboard brightness in low light and setting a timer for Turn keyboard backlight off after inactivity.
How To Enable The Keyboard Light On Windows Laptops
Most Windows laptops rely on a function key shortcut. The exact key varies by brand, but the logic is the same.
Dell. Look for the backlit keyboard icon on the F5, F6, F7, F10, or Right Arrow keys. Hold Fn and press that key repeatedly to cycle through brightness levels and off.
HP. The backlight key is usually F5, F9, or F11. Press Fn + that key to turn it on. On some models, it is the Right Arrow key. Cycle through brightness levels by pressing it repeatedly.
ASUS. The standard shortcut is Fn + F7. On some models, use Fn + F4 to increase brightness and Fn + F3 to decrease it. On ASUS gaming laptops, it is typically Fn + Up or Fn + Down.
Brand-Specific Shortcut Reference
| Brand | Common Key / Shortcut | Notes |
|---|---|---|
| Apple Mac | System Settings > Keyboard | Use the slider or keyboard brightness keys. |
| Dell | Fn + F5/F6/F7/F10 or Right Arrow | Cycle through brightness levels. |
| HP | Fn + F5/F9/F11 or Right Arrow | Cycle through brightness levels. |
| ASUS | Fn + F7 (or Fn F4/F3) | Gaming models often use Fn + Up/Down. |
| Logitech | Dedicated backlight key or Fn + F-key | Check top row for the icon. |
What To Do When The Regular Shortcut Does Not Work
It is very common to press the key and see nothing happen. This is almost always due to Fn Lock.
Look for the Fn Lock key (usually Fn + Esc). Pressing this toggles how the function keys behave. Try pressing your backlight key again without holding Fn. If you need the Fn key to work with it, make sure Fn Lock is off.
If that does not solve it, enter the BIOS (usually by pressing F2 at startup). Dell users, for example, can navigate to the Keyboard section and set Keyboard Illumination options. Dell’s official guide for backlit keyboards covers this exact process step by step.
Common Keyboard Backlight Mistakes To Avoid
Assuming the keyboard is backlit. Not every laptop model includes this feature. If you cannot find an icon or a setting, check the manufacturer spec sheet before spending time troubleshooting.
Ignoring the Fn Lock. This is the number one reason a shortcut fails. A quick tap of Fn + Esc resolves most issues.
Battery saving features. Many laptops automatically turn off the backlight to save power. Check your power management settings and any keyboard timeout options in the BIOS.
Troubleshooting Summary
| Problem | Most Likely Fix |
|---|---|
| Shortcut does nothing | Tap Fn + Esc to toggle Fn Lock, then try again. |
| Light turns off by itself | Check the keyboard backlight timeout in BIOS or power options. |
| Light is dim | Cycle the backlight key through the brightness levels. |
| No backlight setting in OS | The device may lack the hardware; check the manual or spec sheet. |
Finish With The Right Shortcut
Enabling the keyboard light is usually a matter of finding the correct button or combo for your specific model. Start with the function keys, check for the Fn Lock, and if you still hit a wall, a quick check of the relevant support page will confirm you have the right shortcut for your device.
References & Sources
- Dell Support. “How to turn off or on and troubleshoot the backlit keyboard on your Dell notebook computer.” Official guidance on enabling keyboard illumination and BIOS settings.