@mdel
So, I check my box:
1) strings /dev/block/env:
multiboot seems to exist in my /dev/nand_env: https://yadi.sk/i/BnYRrmOkw7RVk
2) I capture my boot.img blob: https://yadi.sk/d/RoEp4iTSw7RVY. What next? I need to extract dtb file?
@balbes150
I use another sd card to create linux bootdisk. I try 16g sd card and 16gb usb flash. Box start normaly, display first splash screen, and then, when start reeading flash drive, reboot.
I use my pc hdmi monitor with box.
I have link for AlexELEC linux img for my box: https://yadi.sk/d/LmcDKKy3w7UKy
Also my box described here: http://mysku.ru/blog/china-stores/41504.html
I don't have firmware archive, but may extract it from box, if it need?