I purchased the HTR-5760 in Jan but only recently set it up. ( for now I have the DVD player connected through composite as the sound source) On testing it out the only way I was able to get all 5 speakers to work was in the Stereo mode 7.1. I tried the other pre-defined modes 'Night', 'DTS' etc... and in all of these only the front speakers provide the output and in some may be the center. The back speakers just have a hissing sound or no output at all. Is something wrong here? Or do I need to do something different. Thanks for your help and feedback. Cheers!