Yikes. On pretty much any ThinkPad except for the X1 series, replacing the keyboard is a five minute task you can do yourself, and Lenovo will overnight you a new keyboard. The only tool needed is a #1 Philips screwdriver.
Alas, the X1 Carbon and X1 Yoga abandoned this design. The keyboard is no longer a CRU (Customer Replaceable Unit). It's a complete teardown to get to it. But if you get the onsite service option they will send someone out the next business day to replace it.
Alas, the X1 Carbon and X1 Yoga abandoned this design. The keyboard is no longer a CRU (Customer Replaceable Unit). It's a complete teardown to get to it. But if you get the onsite service option they will send someone out the next business day to replace it.