My device is a “YanHe,” an educational box(without BlueTooth). I downloaded the latest stable version of CoreELEC and placed the DTB file in the root directory of the SD card. However, it cannot boot into the CoreELEC system interface; it gets stuck on the box’s boot screen and restarts in a loop. Some say it might be because the device has locked the boot partition, or the DTB file is incompatible (I have tried both the 2G and 4G versions, with the same result). How can I resolve this?
Attach UART adapter and check what you get on it.