Dell D6000, Displayport has stopped working after 6 months

[jccarmichael]

My Dell Dock D6000 has been working just fine for about 8 months, but upon startup two days ago it's as if the display ports don't even exist. I keep everything plugged into the dock, and it never moves. My Dell XPS 13 9380 laptop stays plugged into the dock most of the time, and I occasionally disconnect it to take it to another part of the house. I've never experienced these issues with this arrangement.

Device manager doesn't see any display ports. The laptop seems to "think" everything is fine. I'm getting USB activity through the dock, just not any signal out through the display ports, each of which has a Dell monitor plugged into it.

I'm running Windows 10. I recently had several updates complete, but everything was working after them. I have verified that my dock has the most up to date firmware, and my laptop is fully updated (including bios and drivers). I'm desperately in need of a solution.