“2 questions, why does the tv goes dim at times and then returns? Second question, why does the tv give a popping noise?”
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new55inchtv - The expansion and contraction of the TV's outer casing may cause a popping noise and does not indicate a product malfunction; please know your TV is safe to use. Your TV's ECO sensor automatically adjusts the brightness level according to the ambient light level. If the ECO Sensor has adjusted the screen’s brightness level, you can select Min. Backlight to manually adjust the minimum screen brightness. You can also disable these features for steady brightness setting. You can disable Brightness Optimization, Brightness Reduction, Motion Lighting, or Contrast Enhancer by going to: Settings > General > Power and Energy Saving > and adjusting the Brightness Optimization, Brightness Reduction, and Motion Lighting. ^Gina
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