LED DISPLAY BOARD CABLE for most Royal Vendors Soda Vending Machines including models 550, 650, 660, 804. The display board cable has 4 pin connection at display and 5 pin connection to controller (Will work with 4 pin at controller as well). If machine is accepting money and vending - but LED display is not lit. Then most likely the LED display board or Cable needs replaced. The pic of LED Display board is for reference only - NOT included! This display cable is brand new.