键盘上的音量键无法正常工作

First, check if the Fn key setting is interfering by trying both the volume key alone and Fn + volume key, then toggle Fn Lock with Fn + Esc if available. 2. Enter BIOS/UEFI during boot and enable function keys or disable Hotkey Mode to ensure volume keys are recognized. 3. Update or reinstall audio drivers via Device Manager or download the latest version from the manufacturer’s website. 4. Verify keyboard and accessibility settings by testing volume in different apps, disabling third-party keyboard software, and turning off Filter Keys. 5. Test for hardware issues using an external keyboard or booting into a live Linux USB to isolate whether the problem is with Windows or the physical keyboard. 6. Run the built-in audio troubleshooter in Settings > System > Sound to detect and fix common issues. 7. As a last resort, uninstall keyboard drivers in Device Manager and restart to reinstall them automatically. Most volume key problems are resolved by adjusting Fn settings or updating drivers, and the issue is typically fixable without hardware replacement.

If your volume keys on the keyboard aren’t working, it can be frustrating—especially when you’re used to quickly adjusting sound. The issue could stem from software, drivers, function key settings, or even hardware. Here’s how to troubleshoot and fix it step by step.

1. Check the Function (Fn) Key Setting

Many laptops require you to press the Fn key along with the volume keys (e.g., Fn + F10/F11). But sometimes the behavior is reversed:

• Try pressing just the volume key (e.g., F10, F11, or dedicated ▲/▼ keys).
• If that doesn’t work, try Fn + the volume key.
• Some keyboards have an "Fn Lock" feature (like Caps Lock for Fn). Press Fn + Esc (common on Lenovo, Dell, HP) to toggle it. After that, volume keys may work without holding Fn.

? Example: On many Lenovo laptops, pressing Fn + Esc turns on "Fn Lock," making volume keys work by default.

2. Ensure Volume Keys Are Enabled in BIOS/UEFI (Laptops)

Some laptops disable multimedia keys in BIOS:

1. Restart your computer.
2. Enter BIOS/UEFI (usually by pressing F2, F10, Del, or Esc during boot).
3. Look for settings like:
   • Action Keys Mode
   • Function Key Behavior
   • Hotkey Mode
4. Enable Function Keys or disable "Hotkey Mode" so F-keys work as standard keys.

Save and exit.

3. Update or Reinstall Audio Drivers

Missing or outdated audio drivers are a common cause.

On Windows:

1. Press Win + X → Device Manager.
2. Expand Sound, video and game controllers.
3. Right-click your audio device (e.g., Realtek Audio, Intel Smart Sound Technology) → Update driver.
4. Choose Search automatically for updated driver software.
5. If that doesn’t help, right-click → Uninstall device, then restart your PC to reinstall it automatically.

Also check your laptop manufacturer’s website (e.g., Dell Support, HP Customer Care) for keyboard or audio driver updates.

4. Check Keyboard and Accessibility Settings

• Go to Settings > System > Sound and ensure the volume slider responds.
• Test the volume keys in different apps (e.g., YouTube, Spotify) to rule out app-specific issues.
• Disable any third-party keyboard utilities or macro software that might interfere.
• Make sure Filter Keys or other accessibility features aren’t blocking input:
  • Settings > Accessibility > Keyboard → Turn off Filter Keys.

5. Test for Physical or Hardware Issues

• Try an external keyboard. If the volume keys work on it, the issue is with your built-in keyboard.
• Check for physical damage or liquid spills.
• Boot into a live Linux USB (e.g., Ubuntu). If the keys work there, it’s a Windows-specific issue.

6. Run the Audio Troubleshooter

Windows has a built-in tool:

1. Settings > System > Sound > Troubleshoot.
2. Run the audio playback troubleshooter.
3. It may detect and fix driver or configuration problems.

7. Reinstall Keyboard Drivers (Last Resort)

Back in Device Manager:

• Expand Keyboards.
• Right-click your keyboard → Uninstall device.
• Restart your computer to reinstall the driver.

Bottom line: Most volume key issues are due to Fn key settings or audio driver problems. Start with toggling Fn Lock and updating drivers. If nothing works, consider a hardware fault or OS-level glitch (a clean boot or system restore might help).

Basically, it’s usually fixable without replacing hardware.

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