I have a toshiba tv/vcr combo and recently it started having a black box appear on screen that almost covers the screen. It started on one channel and now it's on almost all of them.. If I touch the volume up or down the box disappears for about 4 seconds, so I have to keep voluming up and down to watch anything. I traded in the cable box for my cable and got a new one because the cable people thought that was it, but it wasn't. Anyone else ever had this and how did you fix it?