S4 Revolution only responding to channels 1-5, no other functions

I have a S4 Rev which will light up, pan and tilt, and respond to fine pan and tilt, but nothing else.  Color scrolls normally on startup, doesn't move with the channel or in test mode.  Only pan and tilt and light in test modes also, no shutter, no gobo wheel, no focus, zoom, or frost doors.  Not getting any error with the led indicators, just solid green after startup.  I tried swapping out the Master Control Card, and no change.  I've opened it up twice and checked every connector I can find to see if it's seated properly, and I'm stumped.  Anyone have anything like this before?

-Carl

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