I have had my 950 for quite some time, but tonight it started doing something strange. On every signal besides Dolby 5.1, it only plays through the right speakers (front and rear). So, when I have an analog signal, or a Dolby 2.0 signal, it shifts everything to the right speakers (and sometimes only the right front speaker!). Also, it seems to work fine in 5-channel stereo with any signal. I am completely stumped. Please help.