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I have not been able to turn the speakers on and off when headphones are plugged in. To the best of my knowledge when headphones or external speakers are plugged into the headphone jack it mutes the TV's internal speakers.
Sorry, there was a problem. Please try again later.Hello. When you connect an external audio device to this TV the built-in speakers will automatically turn off and they can not be enabled unless the external sound device is disconnected. Charles O. Insignia support.
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