Did you ever get the issue resolved? If so, how? I can only use my 6D Mkii in C1 or C2 mode. In any other mode the camera goes dark and nothing works..........except the blinking err 70 on the little display on the top right of the camera.Thank...
I was able to get the camera displays turned back on and most functions work, BUT.......I cannot switch out of C1 or C2. As soon as I switch to any other mode, the camera goes dark, and nothing works except the flashing err 70 in the little display ...
