They are made by hand so human error can occur. You should be able to carefully remove and re-crimp one connector.Did an install today for @dexster
Smooth as silk, used the included short LCD ribbon cable to test, all good.
He had purchased the longer cable from @CPZ - SAVEYOURGAMES so we put that in to finish it off once we had confirmed it worked with the shorter stock cable (just easier to test with the short cable).
Long story short, the longer cable didn't work and is wired backwards. Is this common?