# 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 question could use some more information and pictures. It is a fact that some of the cheap displays have the EXP ports upside down, I have had that myself so I cut out some slots for the notches on the cable connector.
– 0scar
Jan 29 '19 at 23:17