Why is my Lecture Capture displaying a green screen?

Reasons why your lecture capture is displaying a green screen.

If your lecture capture is displaying a green screen as seen below, it means the lecture capture device received a video signal but is not able to see it due to it receiving an encrypted video signal. This happens almost exclusively with Mac users. Unfortunately, Apple products use HDCP (a security protocol) to encrypt their video signals when using an HDMI output. There's two options available to circumvent this and ensure your Mac is lecture captured. 



Option 1
  1. Check if the touch screen has a Content Protection setting under the HDMI source selection at the touch screen. 

  2. BEFORE connecting your Mac, set Content Protection to OFF
  3. After setting Content Protection to OFF, you can connect your Mac to the HDMI cable. 
Option 2

If the touch screen does not display a Content Protection setting, you'll need to use the VGA external input instead. In this instance, an adapter will be needed but one can be checked out from the LTS Support Office located in Lecture Center E room E112. 

For more information on the different types of adapters available, please visit How do I know which adapter to use for my laptop?



Keywords:recording no video cannot see can't echo360 alp hdcp hdmi mac apple   Doc ID:90400
Owner:Isaias H.Group:University of Illinois at Chicago ACCC
Created:2019-03-14 14:06 CSTUpdated:2019-08-27 12:13 CST
Sites:University of Illinois at Chicago ACCC
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