Symptoms
- No keys respond at all, including modifier keys
- Trackpad and other functions still work normally
- External keyboard works fine when plugged in
- Problem appeared suddenly with no spill or drop
Likely causes
- CommonKeyboard driver crashed or became corruptedA driver glitch, often after an update, can disable the entire built-in keyboard while leaving everything else working.
- PossibleKeyboard accidentally disabled in system settings (rare but possible on some laptops with a dedicated toggle)Some laptops have a function-key shortcut that can disable the keyboard.
- PossibleLoose or disconnected internal keyboard ribbon cableEspecially likely after the laptop was dropped or recently serviced.
- Less commonKeyboard hardware has failed completelyMore likely after a significant spill or physical damage.
What to do
- Test with an external USB or Bluetooth keyboard to confirm whether the issue is with the built-in keyboard specifically.
- Restart the laptop fully, since many keyboard driver glitches clear with a reboot.
- In Device Manager, check for the keyboard driver showing an error, and update or reinstall it.
- Check the function-key row for a keyboard lock/toggle shortcut specific to your laptop model.
- If the laptop was recently opened for cleaning or a battery swap, this may point to a keyboard cable that wasn't fully reseated.
- If none of this restores function and there's no spill or drop involved, this likely needs a technician to check the internal connector.
Tools and parts
- External USB or Bluetooth keyboard (for testing)
Replacement laptop keyboard assemblySearch: “[laptop model] keyboard replacement”
When to call a pro
If an external keyboard works fine and driver troubleshooting doesn't fix it, a technician can check the internal ribbon cable connection or replace the keyboard.
Safety
Generally low risk
Generally low risk for a careful person. Stop if anything looks different from what this guide describes.