I have 4 ardupilot boards which I built and set up 24 hours ago, all where working with gps locked and was able to read serial data Lat Long in through ide.
Today I connected the power to the board 1 and could only get a power led on board 1 and 2 and 3 board 4 power and mux. I am unable to reload any programs to the board programmer not responding. These units were all working and have not touched them until today. any suggestions whats going on please