Power & Source of Big Ideas

Hello, I tried to boot the debian from SD with the Method 2 (maskrom 3s) but the led SYS stayed red without any boot from the system. Could you please give me more information how to boot from SD Card ? I also tired ubuntu image with the same result... Do you have a idea about my issue ? My sd is a ...
Could you please confirm that it is needed to use MASKROM button for the first boot from SD Card ?
Because when I tried to boot with SD Card, I always have FriendlyElec OpenWrt prompt.
Thanks in advance for your help !
Hello, I followed these steps with success with Ubuntu Desktop image: https://wiki.friendlyelec.com/wiki/index.php/NanoPi_R6S#Flash_to_TF but nothing started and I have only FriendlyElec prompt. It seems I'm in https://wiki.friendlyelec.com/wiki/index.php/NanoPi_R6S#First_boot I checked the SD card ...
Hello, I followed these steps with success with Ubuntu Desktop image: https://wiki.friendlyelec.com/wiki/index.php/NanoPi_R6S#Flash_to_TF but nothing started and I have only FriendlyElec prompt. It seems I'm in https://wiki.friendlyelec.com/wiki/index.php/NanoPi_R6S#First_boot I checked the SD card ...