You may have set your settings in the On Screen Display (OSD) to MINIMUM instead of at NORMAL setting.
To display the volume bar on the screen, do the following.
- Press the 'MENU' button on the remote control.
- 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 OSD and press the cursor right.
- Press the cursor up/down to select NORMAL and press the 'OK' button to confirm.
- Press the 'MENU' button to exit the menu.