I have a new, strange problem. I have 3 Sony boxes and only one exhibits the behavior. On only a few stations, a black rectangle appears at the lower part of the screen and is about half as wide as the screen and is about half as wide as it is tall. If I switch stations, the rectangle stays for a while then goes away. Also, if I adjust the volume, while the volume display is visible, the screen looks normal. Also, if I turn on PIP and the station in question is the small window, there is no black box in the window. I have tried unplugging the machine and rebooting, but the problem remains. My first reaction was that the problem was in the TV, but that makes no sense because I'm using A/V input and the TV has no idea when I change stations. The whole thing makes no sense. Any ideas?