Replace Logitech MX mechanical key

crwdns2936071:01crwdne2936071:0 — Mark the defective key

To avoid confusion later, mark the defective key. In this case, the “D” key is defective and is marked with a felt-tip pen.

crwdns2936071:02crwdne2936071:0 — Desoldering key

Desolder the marked defective key. Proceed as follows for all three release points:

crwdns2936071:03crwdne2936071:0 — Solder the replacement key

Insert the replacement key into the gap in the circuit board. It only fits into the gap one way.