I’m repairing a Sony android tv, the emmc needs replacing and programming, I’ve got a working board aswell so I can read the firmware, just writing the user data and boot files will get the tv working again, however some apps won’t work as some data is on the RPMB section, it is possible to get all apps working as there’s people who have done it, it is possible with ufi box but I still don’t know how to get the RPMB key to be able to read and write the RPMB section, i don’t know how they do it with the ufi box as I’m just trying to lean these things myself , maybe someone can help me