illusi0n: In that case emmc is wiped or broken or both. LE does not ship and test images for box devices with signed firmware and u-boot (only for board devices we have FIP sources for) so whatever image you're using is probably for G12B or SM1 hardware not G12A, and the RAM timings in the signed firmware are not correct for your board so it faults between BL2 and BL3x and restarts. You're now at the same stage where you need to self-build an image using the FIP sources for the U200 device and hope they work. I'd also go hunting on freaktab for some kind of Android image for the box that you can load or maybe dump the first 2-4MB from as this will get you enough of the factory boot firmware to get u-boot installed. From that point an LE "box" image should boot.
Commits · chewitt/LibreELEC.tv · GitHub <= branch is use for development and experimentation and is rebased freqently. I will publicly refuse support on anything built from it