I have a Sony LCD and I just hooked up my cable box through the HDMI in/out and now I have a box in the upper right hand corner of the screen with a '2' superimposed on every channel I turn it to. As per Sony's tech advice, I took the cable straight from the wall into the TV and the number 2 was gone, so they determined that it must be the cable box. If this is true, how do I get the '2' to go away?