Changing the input signal. Source When you select a connected external device on the Source screen, the output of the selected device is displayed on the TV's screen. To control a device (Blu-ray player, game console, etc.) that supports universal remote control with the TV's remote, connect the device to an HDMI port on the TV, and then turn on the device. You can switch to the output of the device automatically or you can configure universal remote control for the device automatically