Hi to all, i've been reading this post but also others, tried multiple .dtb and multiple images (from balbes150 yandex) but all with the same result.
Tried both with USB stick and SD card. From USB starts without pressing the reset button (behind AV), but for SC card needs to be pressed.
My TV Box is a MXIII 4k, model M82, k200 board with 1Gb of RAM and 8Gb of ROM and, i believe, with a amlogic s802.
I wanted to install ubuntu desktop in eMMC if possible.