I have a denon avr 2309cl reciever for my theater system, it is in my basement in a rack along with my dish reciever. I swapped optical cables to hdmi cables the other day and from then on my tv remote upstairs doesnt work unless I get about 20 ft closer to the reciever, even then it isnt great. This only happens with the denon reciever on, with it off the remote works fine. I tried elevating the dish reciever antenna ( screwed in the back of reciever) but no help. What interference do the hdmi cables create? Any suggestions would be appreciated.