Have you followed the information available on the download page? https://www.armbian.com/amlogic-s9xx-tv-box

Maybe are you experiencing the same issue ? https://forum.armbian.com/topic/56946-h3-reboot-issue/

Today I needed to reboot one of the Orange Pi which is at a remote location.... It did not come back to life.... Maybe some update removed the extraargs=reboot=warm parameter ....

Hi.I want to install the armbian in the mini ms8 pro with the amlogic s912 and 2gb ram ddr3 but i don't know how to install it.I have burned the s912 iso in the microsd but i can't run the installation. Benchmarks Antutu – 40142 GeekBench4 – 476 Single-Core and 2473 Multi-Core 3D Mark Ice Storm Extreme – 6284 A1 SD Bench Memory – RAM Copy 3347.01 Mbps / ROM (R)35.65 Mbps and (W)11.31 Mbps / SD Card (R)14.15 Mbps and (W)12.76 Mbps

No standard way to do what you want. The Armbian images from this site depend on the original android bootloader on the emmc to boot. Since you don't have working emmd these images wont boot. Theoritically if you found a working boot loader for your box and it was put on the SD card, then you would have more options.