Large black square blocks screen

Look for the closed captioning (CC) menu in the set up and turn CC off.

unplug the set for a while , but this problem will return because of a malfunction in the EPROM CHIP , this controls the menu and a few other functions

Try turning off the text box function of the closed caption decoder.

I work at at a school, and we had the same problem. Turns out, it a Closed Captioning problem.

We found the manual, and it states that "If a large black box covers 80% of your screen, the Text mode is probably set. Press 'Closed Caption' to turn it off." The "Closed Caption" button is on the remote. If you don't have the remote (as in our case), you can go to "Closed Caption" in the menu, and pick something like C4 and T4. That stopped the black box for us.

that's a picture inside a picture option, and it sounds like the inside picture is set for a blank channel...just go to the menu, and shut off the picture in a picture option..should do the trick..

and keep the kids away from the machine

Turn off your closed caption...
Bill

FORLDS, go into "menu" and turn "CC" or "closed captioning" off, end of problem :) BMW Rider

I have a Sharp Tv that had the same problem with a large brownish or black square right in the middle of the screen. It only left about an inch around the edges that you
could see the picture moving in behind the big black block or square.I have DISH sat-elite and the book recomending that I check and see if the "caption settings" were on
or off. They were on. I turned the caption settings off and the large square diappeared.

Shut off the closed captioning and your problem will be gone.

I’m happy to help further over the phone at https://www.6ya.com/expert/dewayne_4a10eab6caecdb92

you have accendly turned on closed caption. the closed caption you have tured on is not the normal closed caption we are used to . it is called colsed caption text. either on your remote or in you manu, find the way to turn off cc & you should work ok. good luck.