I can't hear any audio or sound on TV after the ScreenBeam USB  Transmitter 2 connection is established.

This issue may occur on your Laptop/PC with its USB Audio Device.

Use these step as a Workaround:

1. Disconnect the current ScreenBeam Transmitter connection
2. In Windows Control Panel, locate and open Audio/Volume Control Settings
3. Set System audio device as Default
4. Exit and re-launch ScreenBeam software
5. Reconnect to ScreenBeam receiver