I feel like an idiot. A little)
@jock
So what I was able to find out.
rk322x-box.dtb - this is the original file that comes with the multitool by default. If I use it, then there are big problems with the monitor.
If you rename it to the rk3229-at-3nod-func.dtb or rk3229-echo-v10.dtb, then when using the monitor, the blinking is not so intense. Which makes it possible to install the image. When installing, it reports that the installation takes place in mmcblk2
I also unpacked these 2 files from the image:
rk3229-at-3nod-func.dtb - he's not very helpful. If you use it, then the monitor does not blink. But when burning in a one second, a message appears that the image is burned in mmcblk1. Image not installed
rk3229-echo-v10.dtb - if you use it, then the monitor does not blink. The image is burned in mmcblk1
In both variants, when the image was burned in mmcblk1 and mmcblk2, armbian was successfully launched. However, this does not negate the fact that when installed armbian was started, the monitor blinked in any case.
I hope that this information will help solve these problems, and I also hope that I have presented this information more or less clearly.
rk322x-box.dtb rk3229-at-3nod-func.dtb rk3229-echo-v10.dtb