MacBook Pro (Retina, 15-inch, Late 2013) onboard keyboard

NiKeHasroun,

Try these steps before replacing the keyboard;

"If the issue returns after leaving safe mode, startup items are probably at fault. Apps can install such items in numerous places, and they aren't always easy to find or recognize. For that reason, you should first make sure that you've installed any available updates for your Apple software and third-party apps.

If updating your software doesn't help, try any of these solutions:

• Test your login items.
• To learn whether software in your user account is causing the issue, set up a new user account, then log in to it and try to reproduce the issue in that account.
• Unplug all accessories from your Mac, including printers, drives, USB hubs, and other nonessential devices. You could have an issue with one or more of those devices or their cables.
• Reinstall macOS.

If you still need help, please contact Apple Support."

Cheers!

Hello NiKeHasroun,

Thanks for posting in Apple Support Communities!

We see that you are having issues with some of your keys not working on your MacBook after troubleshooting.

We’d be happy to help you!

We’d recommend booting up with safe mode through the steps in How to use safe mode on your Mac to see if the issue occurs in safe mode next.

Take care.

NiKeHasroun,

Thanks for following up.

Since the issue did not occurring in safe mode, you can follow the steps in the article under "If the issue doesn't continue in safe mode".

Safe mode is able to resolve some problems, so restarting and testing if the issue comes back is the first step.

Cheers!