Originally Posted by BIslander
Once again, those pictures mean the input from the source is stereo PCM. The input is stereo PCM and the surround mode is PLIIx. The problem is either at the source or with a setting that allows the receiving device to force the source to send stereo. Have you tried disconnecting the HDMI cable between the receiver and the TV?
you beat me to it!
mkiedrowski, those lights are input
indicators, not audio output. for example, a stereo CD will indicate PCM, add PLIIx to it and the L/R indicators will still be all that's lit up. I just tried this on my own SC-68. sorry, but you're misinterpreting what they indicate. just because the lights say 2 ch doesn't mean it's outputting stereo. you add PLIIx Music to a CD and the L/R lights will be all this lit but you will have complete 5.1, 7.1, or 9.1 audio depending on which mode you selected.
for 5.1 input, the L/R/C/RS/LS/LFE lights will be lit up.
your problem was 2 fold:
1. you were in Stereo mode, so it didn't matter what the input was, all were getting was mixdowned 2 ch. that was your main problem, so you made a lot of progress by taking it off Stereo.
2. misinterpreting what the channel indicator lights really mean.
Unless your receiver suddenly developed a defect, which I highly doubt, IF you hadn't accidentally hit the Standard button and put the receiver into Stereo mode, you would have gotten 5.1 and 7.1 from your discs. if a cable channel was broadcasting in 5.1, then you would have gotten that, too. but if the cable channel is only Dolby Digital 2 channel, that's all you'll get, unless you add PLIIx, Neo, or THX processing.
again, unless your receiver is defective, all this was is a setting issue and you should learn what the various surround modes and buttons do.
let us know if BI and I are right and you are getting surround sound from a 5.1 encoded disc.
you should have solved the stereo only issue by taking it out of Stereo mode. and the rest is learning what the lights mean.
finally, unless you have a 2nd room or 2nd set of speakers setup as B speakers, don't select A+B, just A. as the manual says, by selecting AB, it will do eliminate the rear channels on 7.1 sources.
the best advice I can give you is read the manual. if you had, then you would have known it was saying Stereo on the display because it was in Stereo mixdown format and a button click or 2 would have taken care of it.