Verify the original media content does not have an issue prior streaming to ScreenBeam receiver.
If you are using the HDMI-to-VGA adapter, make sure the 3.5mm audio connector is fully plugged into the audio port on the VGA adapter.
If the Internet is not required during your wireless display session:
Disconnect the laptop/tablet from ScreenBeam.
Disconnect the laptop/tablet from the wireless network. If it immediately connects to another wireless network disconnect from that network again until the laptop/tablet is no longer connected to any wireless networks.
Reconnect to ScreenBeam.
If the problem persists, please contact your IT Administrator for support.