Thank you for the feedback. Glad to hear that my post was helpful.
Although your ‘symptoms’ are slightly different to mine, it indicates that my problem is unlikely to be hardware related. The micro SD card dtb of Ubuntu works fine. The conversation regarding this issue has moved to the following topic:
Perhaps you would like to add your voice and info, too.
I’m going to try the Armbian dtb, as well.
Best of luck.
