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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.

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    $\begingroup$ 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. $\endgroup$
    – 0scar
    Jan 29 '19 at 23:17
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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

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  • $\begingroup$ Yes, my experience was the same, I didn't know you could turn the plastic all the way around, good to know for next time! I just cut some extra slots... $\endgroup$
    – 0scar
    Jan 30 '19 at 22:11
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    $\begingroup$ I've just switched the slots and it worked like a charm, it made my day! $\endgroup$ Jan 30 '19 at 22:43

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