Make sure the line out on the all in wonder 7500 is connected to the line in plug on your sound card.
Start the tv and click on the box with a checkmark button on the tv control panel to access the tv settings. Click on the Dicplay tab and then click on the Initialization Wizard button at the lower left. Advance through the pages to the Audio Configurations box and follow the instructions. Then complete the setup.
If you still don't hear sound open the volume control icon in the sys tray of the task bar and make sure that the "line in" source is not muted. If it is uncheck the mute button at the bottom of the line in slide bar.
If your tv is installed correctly you should hear the sound if you do not alread hear it.
