Restart the laptop
Check if the keyboard is physically connected properly
Turn off Filter Keys, Sticky Keys, and Toggle Keys in Accessibility settings
Update or reinstall the keyboard driver in Device Manager
Enable the keyboard device in Device Manager if it is disabled
Check BIOS or UEFI settings for keyboard-related options
Run the built-in keyboard troubleshooter
Test the keyboard in Safe Mode
Connect an external keyboard to verify the laptop is working
Remove any dust or debris from the keyboard
Perform a system update
Reset the laptop if the keyboard still does not work