I put them back to their original positions now the back one comes on, blinks blue lights for about 30 seconds and shuts off.
I'm losing faith in their long term reliability.......
Edit: I played with back one, I may not have had the sd card seated all the way, removed it, put it back and it started fine.
One of the features I liked about the camera system was the cords locked in, that was an issue I was having with my GoPro systems. But the new style video cables, do not lock into the camera side. the clips are on the camera and the slots for those clips are on the cord, but the cord is narrow and doesn't lock into the clips on the camera.