Install the LCD-200 board and case back into the case front. Make sure to remove the transparent film from the front of the LCD module before installation. Thread the ribbon cables through the slot first so that they poke out into the DRO-550 case front. Carefully drop the case back down making sure not to bend the LED. Once you have it lined up and seated, secure it into place with the bag of flat head screws that was inside the case.