the board worked OK from external power supply. After connecting both external power adapter and micro-USB connector something happened to the board and it is not booting anymore. It seems like something wen’t wrong within power supply. Only wifi and BLE LEDs are ON constantly. It does not boot either from power adapter or microUSB. The USB was connected to the PC, the power supply was the one from the box. Does anyone have any hint what could be burned/broken?