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LG C4 usb ports stay active after power off


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I have been using led strip in the back of the LG C4 tv, I lugged into the TV usb port. Usually the turn on when the TV turns on, and turn off when the TV is turned off. Starting today, the led strip stays on after the TV is turned off, meaning the USB port must be remaining active. I have checked and tried every setting I can see in the TV settings but nothing changes. How to make the usb ports turn off when the tv is turned off?

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