Have the infamous no/dim display. I downloaded the schematic and know the part # (1-517-557-11). Problem is the part is discontinued - even from Encompassparts.com. I have 4 of these faceplates with the no/dim display and 2 left that work. I know it is in the display and not the external dc/dc converter.
Any chance it is some support component on the faceplate that supplies the elctro luminescent display? Looks like there are several components that are between the display and the pins on the back of the faceplate.