Are you using an AC12 or a Reviver?

I vaguely remember that there were different flavours of Reviver depending on application so perhaps you have the wrong one?

I would put a multimeter on the legacy comms outputs and see if anything is getting through.

Similarly connect an SPDIF device up to see if any sound signal is getting through.

In the spirit of Spinaltap, I would like to confirm that I am not involved in the corrupt theft of a global sport.