Display Morechoose the krypton or jarvis build
then using the libreelec sd builder you have created your image??? (I use Rufus)
then choose your device tree depending on the RAM I think S905X uses gxl, but I am not sure
Delete the img.dtb on the sd/usb & copy the downloaded device tree to the sd/usb renaming it to dtb.img
Then with the power to the box off, connect the sd card, hold the reset button in, while connecting the power. wait a few seconds, it should then show the libreelec boot screen.
If that doesn't work, change the device tree for a different one.
I've tried different builds of LibreELEC with different trees and the same result: not working.
The blue led of the box is off and the TV screen is black.
I'm afraid that my box is totally bricked.