Chosen Solution

Button and cable has been replaced but volume wont go down when you press the button. It goes up and you can manually scroll down in the screen but not with the button.

Hi Have you tried cleaning the connector’s on both the cable and the board as iv had issue where new parts don’t work but once I cleaned they with iso (isopropyl alcohol)they work again normally if this doesn’t work make sure all the pins look nice and shiny and not black or burned/damaged Hopefully this helps ,however if it doesn’t please don’t hesitate to give me a shout Thanks:-)