timclare

I wonder if anyone can help. I have a Zero 88 Sirius board that seems a bit confused. If the effects master is not up (even if nothing is programmed into the effects memory) no light is able to come out of the board! It basically takes the appearance of the grand master instead. And if it is up and you move the Grand Master to zero, nothing happens!! I have tried everything I know of including a full reset of all options and settings. Any suggestions would be great!!! Thanks! TC