This occurs because the Dynamic Backlight Control function is adjusting the brightness of the screen when menu items (on-screen displays) or subtitles are detected. Follow these steps to minimize this effect.
- On the supplied remote control, press the HOME button.
- Select Settings.
- Select Picture & Display.
- Select Picture adjustments.
- Select Advanced settings.
- Select Brightness.
- Set Adv. contrast enhancer to Low or Off.