If the Fn key is acting erratically (e.g., keys are stuck acting as numbers), check these two things:
If you’ve ever pressed a key to type a number and accidentally lowered your screen brightness, or tried to lower the volume and opened the Settings menu instead, you are not alone.
You frequently watch videos, listen to music, or work in different lighting conditions where you constantly adjust brightness.
In other words, enabling Fn Lock “locks” the Fn key in the opposite state.
This article explains what Function Lock is, how it works on Dell laptops, and step-by-step instructions to turn it on or off.
On modern Dell laptops (like the XPS, Inspiron, G-Series, and Latitude), the top row of keys (F1–F12) serves two purposes:
Note that Fn lock settings on your laptop keyboard usually do not carry over to external USB or Bluetooth keyboards. Which Setting Should You Choose?
For further help, visit Dell Support and search for your specific model’s documentation.
