I have the same prob in my 4100 Cyclone. i called the dealer today and he told me there are two realease straps hanging down in back, about 3" each side of center, that have to be pulled. He said to reach your fingers under and they would be at about fingertip's reach on the back. Problem for me is my TV is mounted so low, i can't get my fingers under the TV past my knuckles, let alone to reach up behind the TV. I am searching the forum for more advice.