About a week ago I bought a sony KDL-40S2000. The Tv works fine until I tried to hook in up to the Comcast dvr model #dct3412. The problem I am having is that I when I switch between an HD channel and a SD channel the Tv goes blank. If I my TV off then on again it will show the channel. I can switch between a HD channel to another HD channel and it is fine but if I try to go to a SD channel the screen goes blank. I am using a HDMI cord. I called sony and Comcast and both of them don't know what to do and have never heard of this problem. I tried component video cords it will work fine but I want to use the HDMI cord because my component video slots are all full
I am on box number two from Comcast. And I had the problem with the first box and now the second box.