You downloaded a new version of EmuELEC, copied it to an SD card, and inserted it into your Super Console X. All you get is a black screen, but the blue light is on. The default DTB in the new OS is for a generic RK3328 box (e.g., the ROC-RK3328-CC), not your specific Super Console X clone.
The Ultimate Guide to "dtb.img": Reviving or Updating Your Super Console X super console x dtb.img
This is the painful part. Because the Super Console X is a "clone device," there is no official manufacturer support. However, the community has reverse-engineered the hardware. You downloaded a new version of EmuELEC, copied