Checkthe Shift Key. On the left-hand side of the keyboard, make sure you aren't striking Shift key, then try typing again. PC Desktop Keyboard. PC Laptop Keyboard. If the issue is still happening, you may need to restart as part of the troubleshooting process. Before you restart or shut down your computer, make sure to save all necessary work Checkif the keyboard is working properly now. 2. Reinstall the keyboard driver. Press Windows + S to launch the Search menu, enter Device Manager in the text field at the top, and click on the relevant search result. Double-click on the Keyboards entry to expand and view the devices under it. Hi had a very similar problem. My USB keyboard works, and from time to time, suddenly, stops. When I unplug it and plug it back in, it works again for an unspecified amount of time. And then I tested older USB keyboard. Which works without problem. And when I read this reply here, by David Clark, it hit me! Built-in USB hub! Followthe steps below to clean the keyboard. Step 1: Keep your MacBook open and tilt it at 75-degree as shown in the image. Step 2: Apply compressed air to spray the entire keyboard, or keep it Toallow only lower case alphabets, call preventDefault on the event object if the key code is not in the range 'a'..'z'. Check between 65..90 or 'A'..'Z' too if upper case should be allowed. Check between 65..90 or 'A'..'Z' too if upper case should be allowed. RGB Of the keyboards we've tested, the tenkeyless Keychron V3, the 1800-layout Keychron V5, and the full-size Keychron V6 are the most comfortable to type on and offer the most extra features .

only alphabets are not working in keyboard