Looks like that there is a new board version of this TV Box and unfortunately the Armbian images existing for R69 didn´t work for me.   I have tested the images from Google Drive: Armbian 5.59 and 5.46 without success, the same for RetroOrangePi R69 image. I already change SD-Card and power supply, but since this setup works for old R69/PCB version (I have both) I believe that the problem is related with boot process (uboot, fex config, kernel, etc) or other hardware configuration