I have the 850 multidisc machine, with built in codefree (not sure who did the mod but I got the machine from Hi-Spek). I have only got one RCE disc (6th Day - I know, I have no taste) and it won't play it, whereas my cheapo Philips DVD will. Sadly the Philips machine is connected to the TV in the lounge rather than the AVCA1-SE (etc) in the media room . . . Has anyone found a solution that works generally for the Sony 850? Many thanks for any ideas of things to try.