V3.0 upgrade to 2.1.9 bricked unit!

[Dave]

Hi there.
Running V3 hardware and has been reliable since it was installed in 2018.
Today – I went to upgrade it from 2.1.8 to 2.1.9.
Successfully completed a backup to my Mac.
Followed the straightforward upgrade instructions here:
https://openthings.freshdesk.com/support/solutions/articles/5000832310
Submitted the upgarde and sat back.
After ten minutes, thinking it was taking a long time, I tried to ping the unit. No response.
Closer inspection of the unit in situ confirmed the unit was dead. No screen display.
Power supply (24VAC) confirmed ok.
Depower / repower and no display in the LCD.
B1, B2, B3 have no effect.
Seems to have totally died.
Advice appreciated.
Cheers and thanks.
Dave.

[Dave]

Update:
Tried to power it using the micro-usb port on the ESP8266 Main Controller board. I see a flash of the blue LED on the wifi sub-board but still no joy.
Same result with or without the 8-Zone 24VAC power board plugged in.
Thanks.
Dave.

[Author]

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