To check whether a Windows 11 PC has a keyboard backlight and how to enable it, use these steps:
- Look for a backlight key on the keyboard
On many laptops (including Surface devices), a special key on the top row controls keyboard backlighting. It usually has an icon that looks like a glowing keyboard or sun over a keyboard.
- On newer Surface devices, the F5 key cycles through four levels of backlighting.
- On some older Surface models, F7 is used instead.
If there is no such icon anywhere on the keyboard, the device may not support a keyboard backlight.
- Try the backlight shortcut
Press the key with the keyboard‑light icon once or repeatedly:
- Each press should cycle through brightness levels (for example: off → low → medium → high → off).
- If nothing changes after pressing this key several times (and the room is dim enough to see a glow), the keyboard may not have a backlight or the feature may be disabled/unsupported.
- Check special keys behavior (Surface keyboards)
On Surface keyboards or Type Covers, the top row keys act as special keys when Fn is not enabled. One of these keys “decreases or increases keyboard backlighting—cycles through the levels of keyboard backlight brightness, including off.”
- Make sure the Fn key is not locking the top row into function‑key mode if trying to use the special backlight key.
- If the keyboard has the backlight icon but pressing it does nothing in Windows or in UEFI (firmware) on a Surface, there may be a hardware issue.
- Confirm in low light and with external keyboards
- Test in a dark or dim room to see if any light appears under the keys when using the backlight key.
- If using an external keyboard, check the manufacturer’s documentation; many desktop keyboards do not include backlighting.
If no key with a keyboard‑light icon exists and no light appears under any keys in a dark room, the keyboard likely does not support backlighting.
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