Bose Lifestyle 50 - I have my TV connected through the Aux using a two pin cable, red and white into the Bose multi-room interface and the other end into the TV audio L&R. I use to get audio coming through the Bose speakers, however it has stopped working. I don't remember changing any setting or the cabling. There is white noise coming through and I can hear very very faintly the audio from the TV. The CD and radio work 100%.
Check your wires by swapping them out with others, make sure your connected to an audio out on the TV and not an in. The best way to get sound for you TV to the receiver is to connect the cable box audio out to the receiver.