Durabrand DWT1905 TV "dish black box middle" Questions

...dish network sports channels a big black box appears in the middle after watching a program for a minute or 2. If we hit a button or 2 on the remote it will go away but comes back in a minute or so. ...

...dish network picture has a big black box in the middle of the picture. According to Dish Network tech, the problem is caused by the Closed captioning being on. With no remote, I am stuck punching the ...

DISH satalite receiver. A few weeks ago I would come in and notice a black pop up box in the middle of the screen (takes up most of the screen). A message is on the pop up that reads: [t:0