Please follow the steps below to check to make sure the webcam is working properly:

1. While in an OmniJoin meeting, select the Video tab.
2. Select Device Settings.
   
   
3. Configurator dialog will appear. If the webcam is working properly, the video will be displayed on the left part of the screen. If there is no video even though the webcam is correctly connected to your computer, your webcam may be physically inoperative. Leave the meeting, verify the camera is operational using the manufacturer's test applet or replace the webcam. Then try the above steps again.