I have same problem like Alecto828 with Vozke Z6 Plus box, and I installed Coreelec 8.90.5 .
I have tried gxm_q200_3g.dtb, its recomended from: (Which DTB do I use?) in the memory card, but the box is allways displaying “boot”.
I installed openvfd and tried several vfd.conf files, but the display never changes,
Is there anything that I’m not doing right?