Thanks for reply!
yes i have read all instructions really carefully + all in red too:
1. I have downloaded image - Armbian_20.05.0_Arm-64_focal_current_5.6.0-rc4_desktop_20200311.img.xz
2. Using balenaEtcher installed directly to my samsung sd card 64 gb.
3. Downloaded and installed with balenaEtcher to the same sd card u-boot "new version" - u-boot-odroid-n2.img.
4. Edited file uEnv.txt :
"LINUX=/zImage
INITRD=/uInitrd
# aml s9xxx
FDT=/dtb/amlogic/meson-gxm-q200.dtb
APPEND=root=LABEL=ROOTFS rootflags=data=writeback rw console=ttyAML0,115200n8 console=tty0 no_console_suspend consoleblank=0 fsck.fix=yes fsck.repair=yes net.ifnames=0"
5. booted fresh new Tanix tx9s android and maunted prepared sd card.
6. Clicked on "Select" local update and chose the file on the removable media aml_autoscript.zip
8. Start "Update"
9. System reboot twice (as disribed, its blinked 2 times) and after no hdmi signal, no info. waited more than 20 minutes. (all i see on my screen is only TV info - HDMI1, so no signal from tvbox)
Sd card good working and pretty fast, plus after iso install with balenaEtcher i make validate write on success.
If You have the same Tv box, please tell me what i miss, maybe problem with uboot file, wish i have to choose? Again, thanks for Your hard work and answers.