i have acquired a AVD-2000 preamp/decoder for a 5.1 amp without remotes
i have got it working with the analogue 2 channel and "pseudo surround" however i cant for the life of me get it going with either coaxial or ($45 thank you very much) SPDIF "toslink" fibre.
the most i got out of it was unintelligible crackling which didnt change with channels or switching to the other lines

the device is a "my sky" box and im not sure if the sky box doesnt want to work on the optical or coax or the preamp doesnt want to work with the sky box either way im at my wits end