Hi again Richard / Lee / Ian,
Sorry for the delay getting back to you Richard. I did plan to do the test install onto a Pi3B+ yesterday as promised, but was kept busy dealing with other problems, so re-planned to do it today (Saturday), but her indoors had other ideas, so I just got back to it a couple of hours ago.
I first downloaded a fresh copy of the OGN-latest (20201118) software and copied it onto a newly (and correctly) formatted microSD card. I then inserted the card into a brand new Raspberry Pi 3B+, with a spare Bridge.
I attached a monitor, then powered up the unit from a charged battery pack, but all I get is the red power LED (solid red), a brief flicker from the two red & green LEDs on the antenna end of the Bridge and after about 30 seconds the rainbow splash screen appears on the monitor, then everything freezes. I'm not even seeing a single flicker from the green 'Drive LED', so suspect a problem with the card or data download/transfer.
Having left the unit for at least 15 minutes, with no change whatsoever, I then tried powering down and removing and reseating the microSD card and rebooting again - but with exactly the same results. Certainly not what I was expecting from your earlier reports Richard.
I next tried a completely fresh software download (same 20201118 version) and put it onto a new card, but with exactly the same results.
Next, I tried an earlier software version (20200921) downloaded on a previous occasion and loaded onto yet another fully reformatted and resized card. Unfortunately I got exactly the same result, with no visible Drive LED activity and the process again simply freezing at the rainbow screen.
It's getting far too late to think clearly tonight, so I am going to leave it 'til the morning and have another think about what is going on.
Regards
Peter