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[LG Laptop] Fn Keys Not Working (Hotkeys): Causes, Checks & Fixes

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.

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What to Check First

  1. The [Fn Key Lock] feature is enabled in the My gram app (Models released in 2025 or later).
  2. The [Fn Key Lock] feature is enabled in the LG Smart Assistant app (Models released in 2022 or later).
  3. The [Hotkey mode setting] is enabled in the LG Control Center app (Models released before 2022).
  4. The LG On Screen Display3 (OSD3) app is missing or not installed.
  5. The [HotKeyManager] app is set to [Disabled] in Windows startup apps.
  6. 1.In the taskbar search box, type [My gram] and then open the app.
  7. 2.Select [Keyboard] under [PC Maintenance] and set the [Lock Fn Key] switch to [Off].
  8. 1.In the taskbar search box, type [LG Smart Assistant] and then open the app.
  9. 2.Select the [Keyboard Settings] menu.
  10. 3.If [Lock Fn Key] is set to [On], toggle it to [Off].

Why This Can Happen

Symptoms can have more than one cause, and the correct steps depend on the exact model, installation and operating conditions. Use the checks above to narrow the issue before service.

Safety and Model-Specific Guidance

Stop troubleshooting if you notice burning, electrical damage, unsafe heat, gas odor, refrigerant concerns, or water near electrical components. Follow the official LG USA instructions for your exact model.

Frequently Asked Questions

What should I check first for [LG Laptop] Fn Keys Not Working (Hotkeys)?

The [Fn Key Lock] feature is enabled in the My gram app (Models released in 2025 or later).

When should I stop troubleshooting and contact LG?

Stop if the product shows signs of electrical damage, burning, leaking near electrical components, or if the recommended checks do not resolve the issue. Use LG USA support for model-specific service guidance.

Does this guidance apply to every LG model?

Not always. Controls, error codes and service steps can differ by model. Confirm the exact model number and follow the linked LG USA article for model-specific instructions.

Related LG Products

These model pages are linked because the stored category or exact model matches this Help Library topic.

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Read the Official LG Guide