NAND Dumper ? (LG OLED C9)

[mcohrs]

Any chance I can do a full nand dump?

Im a bit worried to brick the TV when messing around to much with the OS via SSH.

Are there any other recovery options such as:

• boot loader
• recovery partiotion
• etc ?

Thanks for your help.

Amazing work btw <3

[Informatic]

There is a way of getting into the bootloader, however this requires access to a working system to enable first. (also this is not public/documented anywhere, and requires some additional hardware - docs regarding this may get published at some point)

If you only stick to customizations via scripts executed on boot in /var/lib/webosbrew/init.d (note: you most probably won't be able to change anything else persistently anyways, since most partitions are read-only and are cryptographically signed), we have safeguards in place to disable these in case something bad happens. ("Failsafe Mode" - if a TV crashes on boot you only get recovery telnet server you can access to roll back any breaking changes you've potentially made)

[levihb]

@Informatic I'm new to all of this. Why can't we disable the partition signing if we have root?

Edit: The Discord helped me out. For anyone else wondering: the partitions are signed, and the bootloader verifies the signature. The bootloader is also signed, and it's checked directly by the CPU. And the CPU uses efuses to represent the key (irreversible).

[mcohrs]

Thanks for clarifying this :)