There are several ways that causes issue in your HP laptop and you think that “my HP keyboard is not working”. You can solve this issue by the following method.
1. First and very easy method to solve this issue is restart your HP laptop.
2. Check whether the keyboard connections are properly connected or not.
3. If you are still struggling with the issue then update your HP laptop keyboard’s driver.
4. Uninstall your laptop’s driver and then reinstall it again.
5. Update your windows if there is any update available.
Source: https://getassist.net/hp-laptop-keyboard-not-working/