I can't figure out what I am doing wrong. I have a GT King and trying to get this LibreELEC image to work.
First, I downloaded this ROM > LibreELEC-AML.arm-9.80-devel-20200117090715-6e9040d-amlg12.img.gz.
2. Created a bootable disk from this ROM using the "Etcher" app.
3. Changed the "uEnv.txt" to look like this >>
FDT=/dtb/amlogic/meson-g12b-gtking.dtb
LINUX=/KERNEL
APPEND=boot=LABEL=LIBREELEC disk=LABEL=STORAGE quiet console=ttyAML0,115200n8 console=tty0
4. Then I copied this > meson-g12b-gtking.dtb to the root of the SD card and renamed it to "dtb.img".
5 Inserted the SD card into my "King" box, depressed the "reset" button and held it for about 15 to 20 seconds after I restored the power plug.
Nothing happened. Next I removed the "img.dtb" from the root of the SD card and tried again, still would not boot.
To be noted a couple of weeks ago, I tried the same thing, and it worked straight away, but the colors were off so you could not see what was on the screen........
Thanks for help. And always, a special thanks for Balbes150.