A couple of tips on how to best set-up the external screen that is connected to your Cisco Webex room device.
To prevent the screen from going to sleep during a call or a presentation, turn off automatic standby settings.
To achieve the best possible synchronization of audio and video, check the screen's settings:
Choose ‘Game Mode’ or ‘PC Mode’ setting, if the screen is equipped with it. These settings help to reduce the response time and delay.
Switch off any additional audio processing effects, as these effects can cause unsynchronized audio and video.