This is an indicator that the projector is not receiving a signal from any device. There are several possible reasons why this might occur:
You may not be on the correct input selector on the 4-way input selector box in the A/V Booth. Inputs are:
1 - The visuals computer in the A/V booth
2 - The input for the VGA connector under the pulpit
3 - Unused
4 - a "guest" input VGA cable in the A/V booth
The input selection on the projector remote may have been changed. To correct, press the input button on the projector remote until you see "Input 1" on the screen. Caution: Do not press the button in rapid succession. The projector needs time to cycle through the input "groups" and settle on Input 1. If you keep pressing the button rapidly you will continue to pass by the group for Input 1 and will never see it.