Anyway, this box has an Amlogic S802 and currently has the provider custom firmware on Android 4.4.
I am not interested in Android but to run Armbian or Open/LibreElec booting off SD/USB. Internal NAND can stay as is, it does not matter to me.
I tried several images but unable to activate the boot from SD/USB. I tried to enter recovery using the pinhole button on the back. It goes into recovery but does not boot the external devices.
Anyone has ideas?