“Why does my picture occasionally dim significantly for several minutes?”

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• I had the same experience. If you turn off the Auto dimming (ECO) feature, this tends to stop. From what I can tell, this is caused by a combination of the ambient light in the room hitting the sensor that drives this feature and the TV video signal itself. The TV wants to upscale the format to take advantage of the 4K, but the signal loss will sometimes show up as a dimmed image.

  Answered by TxTR 9 years ago

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• There are ECO settings for each source that you have to turn off in the settings menu or the TV will automatically dim.

  Answered by Gimme 9 years ago

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