The HDMI standard gives you YUV out of HDMI. Does your CG series not have an HDMI input? If it does what happens if you just run HDMI? What is the model number of the Eizo? Do you have the firmware up to date on the HD Link. What settings do you have for the HDLink?
No I was and am able to firmware update them without an SSD drive. Sometimes I have to hit the power button again when the camera is on and the Utility launched for the camera to be seen but that always worked if it didn’t find it right off.
The camera has to be on and plugged in USB when you launch the utility. If it shows the message for long just hit the power button on the camera but don’t hold it down. See if it will detect finally. Don’t plug it in to the USB3 if you have that.