siljaer
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siljaer's post in Nanopi Neo 3: board does not start after upgrading to 22.02 was marked as the answerAs found out by @lpirl, the problem is the missing dtb file after the upgrade.
I recovered the rk3328-nanopi-neo3-rev02.dtb file from a different sd (but you can extract it from older images), and I copied it in /boot/dtb-5.15.25-rockchip64/rockchip. Check that /boot/armbianEnv.txt is pointing to that file (mine has the line "fdtfile=rockchip/rk3328-nanopi-neo3-rev02.dtb")
That solved the problem.