Keyboard (ENTER) fix for vintage 12c?

[lemontea]

Thanks for the "innards" web page! I had been trying, without luck, to locate "teardown" vides on YouTube (well serendipitously that's how I came across the KINOMI project).

For my 12c I wonder if it is a broken snap disk on the ENTER or if the key itself has a broken hinge or something.