SteeMan - OK - so as a total non-developer, I will steer clear of 'mainline kernels (at least until I can learn some more😀
TallMan - I only wish everyone online was as helpful as you have been. I actually got the thing to work using your instructions, which is a first for me using online 'help'. I no longer have a useless brick.
I have a red/blue flashing LED, a working desktop, and (now) a need to learn something about Armbian - this being my first sight of it. Some of it looks familiar from Mint due to the Debian heritage
I also want to learn how to make the OPi boot from either the EMMC or the SDD, as I understand this is much faster - although it works, booting from the SD card clearly doesn't do justice to the OPi hardware (and life is too short😀.
Thanks to all who responded - you all helped. Keith