LCD full graphic smart controller, no character display and screen blinking After uncommenting the REPRAP_DISCOUNT_FULL_GRAPHIC_SMART_CONTROLLER, the display is blinking and no characters are shown on the screen, I have already switched the cables between EXP1 and EXP2, but it did not succeed.
this problem can be solved by turning the slots on the display, as in the image below. Some Chinese displays are inverted from factory.