“I have a 55lf621u19 how can I get it to stay in composite mode when turned on. The answer already given on this site doesn't make sense . I go to setup, sound/ display the power on selection isn't there.”
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Not sure what settings you are looking at. Here are the exact buttons to push: Home > Right (X5) > Down > Right (X3) > Select > Down (X3) > Select > Down > Select
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