Symptoms
- Several keys in one area or scattered across the keyboard don't register
- Problem started suddenly, often after a spill or drop
- Keys in a specific row or section are affected together
- External keyboard works fine, confirming it's not a software issue
Likely causes
- CommonLiquid spill affecting a section of the keyboardLiquid often spreads and shorts out a cluster of nearby keys rather than just one.
- CommonLoose or damaged keyboard ribbon cable connectorA partially disconnected internal cable can disable an entire row or section.
- PossibleKeyboard driver corruption or a stuck key combination (like a sticky modifier key)Software issues can make keys appear dead even though the hardware is fine.
- PossiblePhysical damage from a drop affecting the keyboard assemblyImpact can dislodge internal connectors even without visible external damage.
What to do
- Test with an external USB or Bluetooth keyboard to determine if this is a hardware or software/driver issue.
- If it's software-related, update or reinstall the keyboard driver in Device Manager.
- Check for a stuck modifier key (Shift, Ctrl, Fn) that could be altering how other keys behave.
- If a spill caused it, power off immediately and let it fully dry for 24–48 hours before testing again.
- If it's hardware and no spill occurred, this may point to a loose internal ribbon cable that needs a technician to reseat.
- Avoid pressing affected keys repeatedly or forcefully while troubleshooting, since this can worsen physical damage.
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 confirms the built-in one is at fault and it's not a simple driver fix, a technician can reseat the ribbon cable 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.