If one of the Dtrack cameras goes missing, then try this:

  * Power off and then power on the ART hubs (there are 2 of them) that are behind the front screens in the CAVE.  They are on a small server rack.
  * Use DTrack2 to reboot the ART controller by using the menu: DTrack2 > "Controller Reboot".


---------------------------------
No Sync Signal Error from Dtrack2

The projected image on the screen of the front left projector was blinking (and none of the other projectors were doing that) (front left)
I noticed that there is a blinking green light on the projector where there was an input for 3D
Jay had me power cycle the little BNC hub in the back of the CAVE
Then I shut down the front left projector witht he crestron, and I'm waiting for the projector to "heat cycle" (you wait 5 minutes, or until the projector's fans stop spinning)
We are going to try to pull the power plug on the projector 
Unplugged the projector from the power cord
Waited one minute
Then turned the projector back on from the crestron