To fix the delay between picture and sound on your TV, simply do the following:
Step 1: Press Menu button on the Home Theatre System remote control.
Step 2: Using the navigation keys, on the screen navigate to Settings, then press the Enter button on the remote control.
Step 3: Within Settings, navigate to Audio, and press the Enter button.
Step 4: Select Audio Sync, and press the Enter button.
Step 5: Select a value between 0 – 300ms until the delay between picture and sound is resolved.
If sound delay is still present, check the firmware version and install necessary updates.