Please refer to the following steps to enable sound output through the speaker connector and the optical out connector on the docking station or port replicator:
1. Click Start, select All Programs and click VAIO Control Center.
2. Double-click Station and Port replicator and select Enable output to the speaker connector and the OPTICAL OUT connector on the station/port replicator.
3. Click Apply and click OK.
Note: This setting can be made without having to restart the computer.