It will be hard to diagnose without more information. Can you tell us your signal path? Are microphones plugged directly into the mixrack or do you have any subsnake a running on stage or under stage to floor pockets? Where is the mixrack located and is it directly connected via GigaAce port to the s7000? When you say there isn’t anything sending or receiving from the console, are these local inputs/outputs connected to the surface or elsewhere? Do you see metering and hear no signal or does it appear that no signal is even hitting the input sockets?
Do you have any outboard inserts (example: waves plugins) that might have be breaking signal paths?
When you look at your home screen, do you have check marks by all your I/O connections confirming clock sync?
