Laptop some key not working

[Manjur25]

My note book (HP 15.6 inch Laptop PC 15-d4000 (4C802AV)) some key not working.

[Max3Aj]

@Manjur25, Welcome to HP Support Community. 

Thank you for posting your query, I will be glad to help you. 

If some keys on your HP 15.6 inch Laptop PC 15-d4000 (4C802AV) are not working, here are a few steps you can follow to troubleshoot the issue:

Basic Checks

• Restart your laptop: Sometimes a simple reboot can fix temporary glitches.
• External keyboard test: Connect a USB keyboard. If it works fine, the issue is likely with the laptop’s built-in keyboard.

Check for Physical Damage or Debris

• Gently clean around the non-working keys using compressed air or a soft brush.
• Check if any keys are physically stuck or damaged.

Update or Reinstall Keyboard Drivers

• Press Win + X → Select Device Manager.
• Expand Keyboards → Right-click on your keyboard device → Select Update driver.
• If updating doesn’t help, try Uninstall device and restart your laptop. Windows will reinstall the driver automatically.

Run HP Hardware Diagnostics

• Turn off the laptop.
• Turn it back on and immediately press Esc repeatedly → Press F2 to open HP PC Hardware Diagnostics.
• Select Component Tests → Keyboard Test.
• Follow the on-screen instructions to test each key.

Check for Windows Updates

• Go to Settings → Windows Update → Check for updates and install any available.

I hope this helps. 

Take care and have a good day. 

Please click “Accepted Solution” if you feel my post solved your issue, it will help others find the solution. Select "Yes" on the bottom left to say “Thanks” for helping! 

Max3Aj

HP Support