Some HDMI sinks, especially older LCD screens signalling a higher color bit depth as they support. This can lead to no video on the screen if connected to a CDH. Ths solution is to change from "automatic" to 8bit or 10bit color bit depth.
This change can be done by using the yelloGUI and connect the device via USB.
yelloGUI: http://www.lynx-technik.com/en/support/download-area/yellogui-software/