I have an older V2 and the USB stopped working. I can load a script via an SD card and it seems to work (even the uart works), but when I connect to USB I get nothing. It is like the computer doesn’t even recognize that it is plugged in. I’ve tried multiple computers. Did the USB just die?
One clue; I was using a USB cable that was loose when it stopped working, before that it was connecting and disconnecting when I wiggled the cable. I know, I should have just switched cables (I had had problems with that cable before). I suspect that I may have corrupted the internal flash on the camera while trying to write to it.