All the personal stuff aside, I have a 2002 Adventurer that the original owner modified the electronics as only someone who does not understand what they are doing would do. The stereo system was stripped out and a flat panel TV installed and a BluRay player installed, he did not have the old cables removed, he just had new ones installed for the new equipment. It has taken me awhile but I did get everything working and remove the non-crimp and non-compression F type connecters. I decided to remove the plate above the B.O.M.B. and check all the connections and yes it is a problem.
So as long as you are going to be waiting for the flat screen to be installed, I would write down what you want installed. Even if you are not using a BluRay player, have the HDMI cable installed, same for the satellite DVR, have a HDMI cable installed from the left hand cabinet to the new TV. You don't have to connect them at this time but it will make upgrading in the future easier. Remember the HDMI cables don't go through the B.O.B.M., they go directly to the set from the player or satellite box. My Samsung smart TV even changes the input to whatever input is supplying a signal. If I have the BluRay player turned on, it will override the signal input from the batwing and switch to the player. Pretty neat features.
I feel as Chuck_thehammer does, it is the TV and not the cables. Easy to check, just bring one from inside the S&B and hook it up. This would most likely eliminate all questions.