I'm trying to configure a display with an SD adapter connected to my Mini-Rambo board, but I still see only two rows of squares on it. I don't really know what is the correct type of my display (I bought it on eBay, it was described as "New 2004 LCD Display 3D Printer Controller"), so I tried to enable different options in the Marlin config: ULTIMAKERCONTROLLER, ULTIPANEL, PANEL_ONE, REPRAP_DISCOUNT_SMART_CONTROLLER, G3D_PANEL... But I have still the same results - only backlight is working. Any advice? According to my connections: Display port 1 is connected to AUX1, display port 2 to AUX on the board.