Why is my laptop keyboard not working

Oh no, a non-working laptop keyboard can be super frustrating! Let's see if we can figure out what might be going on. Here are a few things you could check:

• Is it just a temporary glitch? Sometimes a simple restart of your laptop can resolve minor software hiccups that might be affecting the keyboard. Have you tried rebooting it?
• Are the keys physically stuck? Take a close look at the keys. Are any of them visibly stuck down or feel different than the others? Sometimes a bit of debris can get lodged underneath.
• Could it be a driver issue? The software that allows your keyboard to communicate with your computer might be acting up. You could try updating or reinstalling your keyboard drivers.
• Is it possible the keyboard got disabled accidentally? Some laptops have a function key combination that can disable the internal keyboard. Check your laptop's manual or look for a key with a keyboard icon and try pressing it in combination with the Fn key.
• Is it only certain keys that aren't working? If only a few keys are unresponsive, it might indicate a more specific hardware problem with the keyboard itself.

Since the question is on iFixit, there's a good chance someone else has encountered the same issue with an HP EliteBook. Have you had a chance to look through the existing questions or repair guides for that series? They might have some specific troubleshooting steps or solutions that could help!

Well I will suggest you to check for your keyboard driver sometime outdated can also be the reason of this issue so check the driver and make sure the driver is updated to it's latest version if the driver is outdated then update the driver to it's latest version.

If possible, try connecting an external keyboard to determine whether the issue is with the laptop's built-in keyboard or related to software.