Input Switching to D.In

I have a 9000 series TV and Home Theatre HT-C6600 and was having the same issue with the input on the HT switching to D.In after the TV powered on. Anyway, I did as suggested and connected the cable box with HDMI to the TV for the video, and then the optical from the TV to the HT system. This did the trick, thank you so very much! The input on the HT now stays on HDMI-1 and there is peace in my house once again.