Hello! I have a big problem I connect my boards to USB port. Rx/Tx together blink 3 times and nothing ... everything power down except the blue Led from ArduMega and the red, yellow, blue on the red board.   It is very strange because I put code well before and all Leds were blinking. I don't understand why it worked before and now anymore.   P.S When I tried to setup my receiver with configurato…