[arm-allstar] RPi 4B won't boot, LED pattern 'Unsupported board type'

[Larry Mollica]

Got a brand new Raspberry Pi 4B 2GB from adafruit the other day. Trying to boot a fresh burn of hamvoip v1.6-14 but I can’t get it to go.
I’ve misplaced my micro-hdmi adapter, so I can’t see the console but the green LED flashes 4 long, 4 short.

This apparently means 'Unsupported board type’. ??

I can boot the same SD card in a Pi 3B and it comes right up no problem.
I can boot RasPBX on the Pi 4B and again, boots no problem.

It’s the hamvoip - Pi4 combination that fails. I’ve burned two different micro SD cards, one on windows, one on a mac. Same failure.

Any help appreciated.
Larry AD6G