The images where applied with Balena etcher. Petitboot was removed as described. The PSU was included in the bundle (15V 4A). Odroid Ubuntu works fine. The boot process stops at: Booting kernel ... I tried the following Images (none of them works): Armbian Buster - mainline kernel 5.10.y Armbian Focal - mainline kernel 5.10.y What am i missing ? Any help appreciated.