@zwede , it's the issue from the other thread:
Consolidated eMMC Thread (MCU repair) (Black Center Screen)
It must have been a surprise to Tesla as well, that the board swap doesn't work with all cars. There seem to be many owners now with GPS or audio problems..
Aha, Thanks. I figured I couldn't have been the first to run into this. You'd think Tesla would offer a newer MCU1 for the same price as Tegra replacement to support us early adopters...