[LG Laptop] Fn Keys Not Working (Hotkeys)

If the Fn keys (hotkeys) on your LG laptop are not working, or if you cannot adjust the screen brightness or volume, it is likely because the [Fn Key Lock] is enabled in the settings app, or the essential LG On Screen Display3 (OSD3) driver is not installed.

Why are the Fn keys (hotkeys) not working?

If the Fn keys on your LG laptop suddenly stop working, check the following causes based on your model and installed software:

• The [Fn Key Lock] feature is enabled in the My gram app (Models released in 2025 or later).
• The [Fn Key Lock] feature is enabled in the LG Smart Assistant app (Models released in 2022 or later).
• The [Hotkey mode setting] is enabled in the LG Control Center app (Models released before 2022).
• The LG On Screen Display3 (OSD3) app is missing or not installed.
• The [HotKeyManager] app is set to [Disabled] in Windows startup apps.

How do I fix Fn key (Hotkey) errors?

Disable [Lock Fn Key] in My gram

1. 1.In the taskbar search box, type [My gram] and then open the app.
2. 2.Select [Keyboard] under [PC Maintenance] and set the [Lock Fn Key] switch to [Off].

Disable [Lock Fn Key] in LG Smart Assistant

1. 1.In the taskbar search box, type [LG Smart Assistant] and then open the app.
2. 2.Select the [Keyboard Settings] menu.
3. 3.If [Lock Fn Key] is set to [On], toggle it to [Off].

Check [Hotkey mode setting] in LG Control Center

1. 1.In the taskbar search box, type [LG Control Center] and open the app.
2. 2.Select [System Settings] and then find [Hotkey mode setting].
3. 3.Click [Not Use].

Check if LG On Screen Display3 (OSD3) Is Installed

1. 1.In the taskbar search box, type [Settings] and select [Apps].
2. 2.Under [Installed apps], check whether [LG On Screen Display3] is listed.

Enable HotkeyManager in Task Manager

If [HotKeyManager] is set to [Disabled] under [Startup apps] in Task Manager, the hotkeys won’t work.

1. 1.Right-click the [Start] button on the taskbar and select [Task Manager].
2. 2.Select the [Startup apps] or [Startup] tab.
3. 3.In the list, select [HotKeyManager]. If its status is [Disabled], change it to [Enabled].
4. 4.Restart your laptop after changing the settings.

What should I do if the steps above don’t fix the issue?

The relevant app may have been deleted, or the files may be corrupted. Reinstall the necessary drivers using the [LG Update] program.

• How to install: Search for [LG Update] in the taskbar search box and launch the application. You can install all updates or only the specific items you need.
• Non-OS models (Windows not pre-installed): Use the installation files provided in the separate DnA partition or download the drivers from the LG Electronics website. Go to [Support] → [Software] or [Drivers for Downloading], search for your model name, and download the required drivers.

Move left or right to check the contents.

This guide was created for all models, so the images or content may be different from your product.