Hi there !
The arming switch pin accidentaly got shorted with brushless motor pin while everything was online. The IO system/ leds and main led on board got shut instantly.
However, i can still connect board to computer, update, downgrade software. And nothing appears to be burnt out visually on the board.
Board powers up and only PWR and B/E led turn ON. rest everything is OFF.
How should i proceed with diagnostics?
May be some diode or regulator shorted out.
I checked the bottom regulator and diode. Regulator works fine and diode has ~3.3V across it.