I have a 85 Inch Samsung Smart TV: The USB plug for my LED strip for the backlights are inconsistent. The USB port is powered and they should come with the TV and go off when he power is turned off. Sometimes the LEDS will light up when the TV comes on and Sometimes they won't. other time they will tend to remain lit when I power the TV down. Is there a setting in the TV to enable the port to power down with the TV?