Bob and Carol--Our 2004 unit had a screw that came into the teli from the side through the wall next to the steps going to the bedroom and with a wooden plug over it and also one that came up from the bottom of the shelf that holds the teli. The one from the bottom was the hardest to find and get out but once it's out the TV moves out with out a problem. If you still have the original TV be ready for some weigh when you pull it out. Those things are killers in the way of dropping when you get the unit out.
You would not believe how heavy that TV is compared to an LED that I put back in! It also takes up about three to four time the depth a new LED does when you put it back in. Leaves all kinds of storage behind it!
Let us know if you find the screws and if you get the old one out!