My car is older than yours, and they sent a Ranger to my house to replace the Tegra daughterboard. After the daughterboard replacement the center touchscreen wouldn't illuminate. The poor guy struggled with it for 4 hours before giving up and telling me that the Tesla people back at home base were remoting into it to update firmware, which would fix the problem.
They eventually gave up too, and decided to replace the full MCU. A Ranger returned today and successfully replaced the full MCU along with a new touchscreen. All is back to normal, but it took 11 weeks to go through the entire fiasco! 11 weeks !!
It's nice to have my car back though, with working AC, turn signals, and radio.