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HP Notebook PCs - How to Lock or Unlock the Fn Key

This document is for HP and Compaq notebook computers.

Some keyboard function keys (f1 through f12) have a printed icon that indicates a secondary action, such as muting sound or adjusting display brightness. Normally, you must press the fn key and the function key with an icon to perform the secondary action.

Function keys (f1 through f12)

fn key

Many notebooks have an action key mode that enables the secondary action without pressing the fn key first. Read the steps for your notebook type to enable this feature.

Enable action key mode

Change the action key setting from the BIOS Setup Utility.

Press and hold the power button for at least five seconds to turn off the computer.
Turn on the computer and immediately press the f10 key repeatedly to open the BIOS Setup Utility.
Press the right or left arrow key to select the System Configuration menu.
Press the up or down arrow key to select Action Keys Mode.
Press the Enter key to display the Enabled / Disabled menu.
Press the up or down arrow key to select one of the options.
- Enabled: Does not require pressing fn to use the actions printed on the function keys.
  
  For example, pressing f8 lowers the sound as printed on the key. Alternately, pressing both the fn + f8 minimizes and maximizes a web browser.
- Disabled: Requires pressing fn to use the actions printed on the function keys.
  
  For example, pressing f1 opens a help window. Alternately, pressing both the fn + f1 keys puts the computer to sleep as printed on the key.
Press the f10 key to save the selection and restart the computer.

Enable action key mode (ProBook 440 G4, 450 G4, 470 G4, and EliteBook Folio G1)

Change the action key setting on certain HP business ProBook and EliteBook models.

Press the power button to turn off the computer.
Turn on the computer and immediately press the Esc key repeatedly to open the Startup Menu.
Press the f10 key to open the BIOS Setup menu.
Select the Advanced menu.
Select System Options.
Select Launch Hotkeys without Fn Keypress.

Enable action key mode (ProBook 440 G5, 450 G5, 470 G5, and EliteBook 830 G5, 840 G5, 850 G5)

Change the action key setting on certain HP business ProBook and EliteBook models.

Press fn and the left shift key at the same time to enable Action Key mode.
When the fn key light is on, you must press the fn key and a function key to activate the default action.

Enable action key mode (older G1 business notebooks)

Change the action key setting on earlier HP G1 business notebook models.

Press the power button to turn off the computer.
Turn on the computer and immediately press the Esc key repeatedly to open the Startup Menu.
Press the f10 key to open the BIOS Setup menu.
Select the Advanced menu.
Select the Device Configuration menu.
Press the right or left arrow key to select Enable or Disable the Fn Key switch.
Press the f10 key to save the setting and restart the computer.

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