Ws65909 Mitsubishi Tv and Dvd player

You may have probably turned on Closed Caption on your TV. Unhook the DVD player to find out if it disappears. If it disappears then Closed Caption is on on your TV. Turn off Closed Caption. If cannot find how, give me the brand and model of your TV.

I have a large black square obscuring the picture. You can see the picture in 1 inch border around the black square. If I reset the input switch, the black square disappears for about one second (the picture is momentarily perfect) and the black square appears again. It is not the cable box because I wired the cable directly into the tv. The same thing happens when I try to play a DVD. Any insights????

If that black box is generated by Tv, it should be there all the time, like on cable, av input etc.
as you said its not always, so cable top box is suspected which can generate such box as well.
I would suggest when you see that box in tv reception, simply play dvd player and check is that box still appears on dvd input? I hope black box wont appear in playback of dvd player.
Need further help, please let me know.

Check your Closed Caption settings. Either turn it off or change it to text 1.

This sound like a problem with the Closed Caption, on many sets if the C.C. is set to text a black box apears, and since it only happens on DVD you might look at the DVD menu and see if it has this Text featcher in the Closed Caption menu and turn it off

turn off you dvd player... them click on "setup" button on your remote control! them click right botton to appear "tv sys" them click "enter"... choose your tv system, PAL or NTSC.

If you have the DVD Player connected to the vcr, it is the copy right protection software that is doing it, this is on every single DVD to defer con artist. A way to fix this, is to get a video image stabilizer, or find a way to work around the VCR. If this does not fix the problem, it is possible that the video output on the DVD Player is malfunctioning somehow

Try turning on component (cable) for the V2 input  on your TV

I was about to go buy a new tv. I'm blaming it on the cat, thanks!

scrool your tv with the remote and go to caption turn off caption and the black will disappear the remote lock the tv in text 1