The Fn key is locked

October 2016

This article offers solution to fixing a frozen Fn key on a keyboard.
A locked Function (Fn) key may sound like a minor problem, but can be a bit troublesome for the user if they are not aware of the solution. It may happen that while typing letters, numbers are being displayed on your screen. To fix this, you need to hold down the Fn key to write normally. The command is different for an IBM system.


If your keyboard is producing numbers instead of letters, hold down the Function key (Fn) on your keyboard in order to be able to write normally.


This is because the digital lock is activated.
  • To solve this, press Fn+Numlk or, depending on the model, Fn+Shift+Numlk
  • On an IBM Thinkpad, press Shift + Scroll Lock Num

Related :

This document entitled « The Fn key is locked » from CCM ( is made available under the Creative Commons license. You can copy, modify copies of this page, under the conditions stipulated by the license, as this note appears clearly.