OK, tap that control a few more times gently. No go? Over in the Cnet Laptop Troubleshooting Forum a kind author gifted the forum with very nice content in the sticky.

It includes how to put a keytop on (and from that you can see how to remove it.) Also there are numerous notes and pictures about how to remove the keyboard cable. In a pinch I can unplug the keyboard ribbon cable and plug in some USB keyboard while I wait for a new keyboard.

Skill level? 2 screwdrivers out of 5.
Bob