Symptoms
- External keyboard doesn't type anything when plugged in
- Keyboard lights up but doesn't register keystrokes
- Keyboard works on another computer but not this laptop
- Keyboard works in some USB ports but not others
Likely causes
- CommonUSB port issue on the laptop (loose, damaged, or disabled)A specific port can fail or be disabled while others work fine.
- CommonKeyboard driver not installed or outdatedEven standard keyboards sometimes need a driver refresh after a system update.
- PossibleFaulty or damaged USB cable (for wired keyboards)Cable damage is a very common cause of intermittent or no connection.
- PossibleBluetooth pairing issue (for wireless keyboards)Relevant only for Bluetooth models rather than USB-wired ones.
What to do
- Try the keyboard in a different USB port on the laptop.
- Test the keyboard on another computer to confirm the keyboard itself works.
- Try a different USB cable if the keyboard uses a detachable one.
- Check Device Manager for the keyboard listed with an error, and update or reinstall its driver.
- For wireless keyboards, check batteries and re-pair via Bluetooth settings.
- Restart the laptop after plugging the keyboard in, since some USB devices need a fresh boot to be recognized properly.
Tools and parts
- Spare USB cable (if applicable)
Replacement external keyboardSearch: “USB or Bluetooth external keyboard”
When to call a pro
If the keyboard works on another computer but not this laptop in any port, a technician can check the laptop's USB controller.
Safety
Generally low risk
Generally low risk for a careful person. Stop if anything looks different from what this guide describes.