Quoted from pinheadpierre:
Nothing yet. Last week they were still trying to get a response from their engineer. I'll follow up here when I hear something.
Marco couldn't figure it out so they asked that I send the display set back for a refund. I was disappointed that there wasn't a fix available but very appreciative of their timely responses and that they stood by their product warranty.
I ordered the system 9 displays from Xpin instead. There were some quality control issues there (missing solder on one pin for a comma and some white scratches on the display faces). Again, I really appreciated the prompt response from customer service (this time directly from Xpin) pointing me in the right direction. They offered to replace the scratched displays and the one with missing solder but I decided that it was quicker to fix them than return them. Ten minutes with a soldering iron, a sharpie marker and the diffuser gels Xpin supplies and the displays both work and look great!
For what it's worth, I really like the fact that Xpin includes the diffuser gels. They help the displays look more stock, especially when off. Their foam gaskets fit better than the Pinscore gaskets, too. Pinscore uses a thicker material that tends to get smashed into the display window when placing the backglass.
That was more of a journey than I expected from new displays but interesting and educational. Thanks to both Xpin and Marco Specialties for excellent customer service.