Quoted from C0untDeM0net:http://pinrepair.com/stranger/s6000_1.jpg
In this picture there is a node board to the right of the projector that is not on the pros. My guess is that node board is the key to unlocking the signal just like the scanner node board for the insider connected.
An easy check of that theory would be to disconnect devices from a premium (with power off) and see if it halts the projector display.