If you are using a wireless keyboard, make sure the batteries in the keyboard haven't died. Check wireless keyboard batteries and wireless adapters
Check the power switch on the keyboard and make sure it is turned on. Most, if not all, wireless keyboards have a power switch so you can turn a keyboard off when not in use to save battery life. If you have a USB keyboard, you may want to try a different USB port to isolate the issue. Disconnect the keyboard from the computer and reconnect it into the same port. Verify the keyboard is plugged in securely. Sometimes the simplest solution fixes the problem. Check for hardware problems Check your connection If the troubleshooting options on this page don't help you fix the issue, we recommend having your laptop looked at by a technician. Spilled liquid on a laptop keyboard can also cause the keyboard to stop working. If you're using a laptop and the keyboard is not working, the issue may be due to a loose or bad connection on the motherboard.
