I was unsuccessful at finding the transmitted beam with the IO GigE 2 camera.  There are indications on the sensor of 1064 light being present, but only very distorted.  I increased the power in the IO path, and increased the power through the rotation stage, and checked the power at the bottom of the periscope, and it matched the reading on IMC_IN.  I then restored both rotation stages to set the IMC_IN power to 2W.