The problem most likely lies with your Comcast Digital Cable box. I have a Comcast Motorola HD-DVR and Motorola made it so that you can't run their cable boxes through a receiver because of copyright protection problems. Basically when you run your cable box through the HDMI switcher in your receiver the cable box detects your receiver as a possible recording device.
The only way to work around this is to run your cable box directly to your TV via HDMI and run a digital optical cable from the cable box to your receiver for audio.
I'm having a problem making my system function correctly. When I connect the cable box and the DVD/VHS unit directly to the TV thru the HDMI connections everything is good. When I try to route same thru the receiver I get nothing. What am I missing? Any suggestions to walk me thru this?I suspect I'm missing something when assigning the input/outputs.Thanks for any suggestions!
Magnovox DCH3200 [Comcast cable]