The TV backlight powers on and off with your TV's USB port, so if the port is supplying power, any USB device plugged into the port will stay powered. Every TV is different, but you have a few options for solving this. The first is to turn off any standby or sleep modes. If that doesn’t work, some users have found pressing the power button on the remote twice will fix the issue. If neither of these things work, you may use an in-line USB on/off switch to manually turn the light on and off, or switch to our Luminoodle Color Bias Lighting (15 color options including white), which has a built in on/off switch, dimmer and wireless remote.