How to Fix Keyboard Keys Not Working

Fix unresponsive keyboard keys with these proven troubleshooting steps. Hardware and software solutions for Windows, Mac, and mechanical keyboards.

1. Clean debris from affected keys. Power off your device and disconnect the keyboard if external. Turn the keyboard upside down and gently shake to remove loose debris. Use compressed air to blow out particles between keys, holding the can upright and spraying at an angle. For sticky keys, carefully remove the keycap with a flat tool and clean underneath with isopropyl alcohol on a cotton swab.
2. Test keys in different applications. Open a text editor like Notepad or TextEdit and test each problematic key. Try the keys in different applications including web browsers and system menus. Press keys individually and in combination with modifiers like Shift, Ctrl, and Alt to isolate whether the issue affects specific key combinations or the physical switch.
3. Check for stuck modifier keys. Press and release each modifier key individually: Shift, Ctrl, Alt, Windows key, or Cmd key. A stuck modifier can prevent other keys from registering properly. Tap each modifier key several times, then test your problematic keys again. Check the on-screen keyboard in your operating system to see if any modifiers appear pressed.
4. Update or reinstall keyboard drivers. On Windows, open Device Manager and expand Keyboards. Right-click your keyboard device and select Update driver, then Search automatically. If updating fails, select Uninstall device, restart your computer, and let Windows reinstall the driver. On Mac, restart and immediately hold Option-Cmd-P-R for 20 seconds to reset NVRAM, which can resolve keyboard recognition issues.
5. Disable filter keys and accessibility features. On Windows, go to Settings > Ease of Access > Keyboard and turn off Filter Keys, Sticky Keys, and Toggle Keys. On Mac, open System Preferences > Accessibility > Keyboard and disable Slow Keys and Sticky Keys. These features can cause keys to not register or register multiple times when not intended.
6. Test with external keyboard or different USB port. Connect a different keyboard to your computer to determine if the issue is hardware or software related. For external keyboards, try different USB ports including USB 2.0 ports if using USB 3.0. For wireless keyboards, replace batteries and re-pair the device through Bluetooth settings or the manufacturer's software.
7. Check for physical switch failure. If cleaning and software fixes fail, the key switches may have failed mechanically. For mechanical keyboards, individual switches can be replaced with desoldering tools. For membrane keyboards or laptop keyboards, replacement typically requires professional repair or keyboard replacement. Contact the manufacturer if the device is under warranty.