Jim, I honestly don't have any idea what the problem could be, however I will say with 100% certainty that it is not the Oppo player

the first time I shipped it everything was working perfect, you received it and said it wasn't so I took it back and checked it out, again everything was working perfect, all 4 PCM outputs are perfect

make sure of the following, this is from my email to you:

it looks like someone had went into the analog audio setup menu and turned the sub and center speakers off and messed up a bunch of stuff, I corrected this and the mod is working perfect, all speakers must be set to on, large, same distance(10ft) and 0db trim for the SPDIF mod to work correctly

-Gary Murrell
http://www.custom-ht.com/oppopowerbuy.html
My Personal HT setup