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.

![enter image description here](