Then disconnect the external keyboard and try the following 1. Uninstall the keyboard driver. 2. Reboot the computer (without reinstalling the driver). 3. When it restarts, it should reinstall the driver on its own. If this doesn't work, you may wish to try connecting an external keyboard and see if it works fine. Turn off the laptop and then turn it back on. Check if the keyboard is working again. Check the connection: If you are using an external keyboard, make sure it is properly connected to your laptop. If it's a built-in keyboard, check if there is any debris or dirt blocking the keys. Update drivers: Make sure the drivers for the keyboard are up Check if you can turn the keyboard lights on or off using the keys. The keyboard backlight has three modes: Off, Low, High. In some keyboards, the combination is Fn+F4. In some it is Fn+F5. On Make sure Slow Keys is turned off. If Slow Keys is on, you must press and hold a key longer than usual before it’s recognized. Choose Apple menu > System Settings, click Accessibility in the sidebar, then click Pointer Control on the right. (You may need to scroll down.) Make sure Mouse Keys is off. Choose Apple menu > System Settings, then .

acer laptop keyboard suddenly stopped working