Verify that all volume options are unmuted, and volume is turned up.
Check PC volume in System Tray
Right click on the volume icon in the system tray
Open the volume mixer
Verify audio is registering when video plays
Check Pixie Volume/Crestron Volume
Pixie Volume
Crestron Volume
Check Video player or Software Volume
Verify audio cable in the wall plate is plugged into
Wall plate
PC audio Out
