I have a S560, which I believe is from the same generation (circa 2000) of SONY DVD players that you are referring to (S360 was the single player without decoders; S560 was the single player with decoders; S570 was the changer with decoders). When I place a single layer SACD into the S560 the following flashes in the display "DVD ... C:13:00" and there is no playback. The manual (page 64) states that the unit is performing a self diagnosis and C13 means that "The disc is dirty." I don't know if the unit is hackable from there.
Regards, Rich
Regards, Rich