Have you double checked that you have connected the input cable to the correct input connector on the Board Pro? (See the Admin Guide to double check the correct HDMI port).
After that, have you checked the Video Input Connector [n] PresentationSelection settings for where you have connected the cable to make sure it is set correctly for the behaviour you expect.
Also, make sure that the source you are trying to share content from is not putting out HDCP protected content. While this may display OK in some circumstances locally, the codec will prevent protected content from being transmitted in a call.
Wayne
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