Mecool s912 Box?

[ffimon]

The device will normally boot off an sd card. I have had little luck with USB and generally find only one of the sockets if any can be used for booting. Also you did copy the appropriate dtb.img file into the card root.

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Which DTB do I use?

As part of the CoreELEC install process you are required to copy a device tree from the device_trees folder on your sdcard/flash drive to the root folder of your sdcard/flash drive and rename it to dtb.img, failure to do so will result in either your box being unable to boot or network problems. Every device is built differently and there is so many to choose from on the market, you can find a list of some of these devices along with the corresponding DTB you must use on our download page here. …