I've got an Onkyo TX NR-609 stereo and overall it's been working fine. That said, as of last week it's stopped - the system shows no speakers connected, no sounds plays through the disconnected ...

affected receiver/speaker packages are the HT-S3400 package using the HT-R390 AVR, HT-S7409 package using the TX-NR609 AVR, and the HT-S8409 package using the TX-NR609 AVR.