... Source>, < ON/OFF>, < Menu>, < Down>, < Source>:switch the input signal between Video and VGA.< ON/OFF>: turn the backlight ... output plug need to match the DC input jack, the diameter of the jack is 5.5 mm.1.2 Before ... connecting these input/output ports, Video port, it is ... and remove the DC 12V plug from the DC input jack. 1.3Don't put the A/D board on ...