Kernel stops loading in middle of boot-up

[Flyback]

Hi there,

I have a custom board (with eMMC) that freezes in the middle of kernel loading:

I am under the impression it is related with the rootfs.ext4, becuase it does not try the loading, but I am not sure yet.

Flash table is the following (I don´t use all the rest of partitions):

Is there any way I can debug or any way to understand what is going on?

Thank you in advance.

[Flyback]

Just in case somebody has the same issue, I was not pointing to the right partition in rootfs in extlinux.conf.