Here are a few steps to try and troubleshoot a stuck or unresponsive keyboard:

1. Reboot: Reboot your computer and see if the keyboard begins to respond.
2. Check Settings: Check to make sure that your keyboard is enabled in ‘Settings’ or ‘Systems Preferences’.
3. Test Different Keys: Test several different keys to see if the keyboard is responding to any of them.
4. Test External Keyboard: Try using an external keyboard. If it responds, the issue may be the laptop’s internal keyboard.
5. Check for Corrupted Drivers: Check for corrupted, missing, or outdated drivers for the keyboard.
6. Clean the Keyboard:If the above steps do not help, carefully clean the keyboard with a damp cloth, making sure the keyboard is disconnected from any power sources first.