You may have set the volume bar setting in the TV menu to OFF.
To display the volume bar on the screen, do the following.
- Press the 'MENU' button on the remote control to access the main menu.
- Press the cursor up/down to select TV MENU and press the cursor right.
- Press the cursor up/down to select INSTALLATION and press the cursor right.
- Press the cursor up/down to select PREFERENCES and press the cursor right.
- Press the cursor up/down to select VOLUME BAR and press the cursor right.
- Press the cursor up/down to select ON and press the 'OK' button for confirmation.
- Press the 'MENU' button to exit the menu.