When I turn on the TV a black square appears & covers almost all of the screen...What's wrong?

Hi Tony

You`ve mentioned that ON CERTAIN CHANNELS THE TV WORKS FINE, so your trying to say that not all channels THE BLACK SQUARE APPEARS IN THE MIDDLE O THE SCREEN... my be that black square is generated from the broadcast center. may be your unit is good. let me ask you how many channels that your tv works fine..?

If you wish to get some details; visit the site linked here. Pull up older posts. http://electronicshelponline.blogspot.com/ Faults & possible causes to LCD & Plasma screen are given with illustrations. You can get an idea about the fault to an extent. Faults to all LCD & Plasma screen are similar, irrespective of its brand and screen size.

Sounds like poor reception - check your aerial connection

If you press display on the remote, it will go away. It will come back, it's a common fault for this set and theres a mod to be done to the eeprom.

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

Most likely it's the closed captioning has been turned on. From your post I assume you have the remote control and able to access the menus so try to turn off the closed captioning. I'll be notified if you post something new.

Turn off your closed caption...
Bill

He, he. Somebody activated the subtitle mode on the remote. Desactivate the CC mode on your menu and it'll go away or at least if you want CC put it in CC1 Text1

This could be part of the text mode, which has to do with the caption. Check and see if it's turned on.

Try goeing into your Menu and see if you have the closed Caption on that will produce a black box on the screen if you have the owners manual look in there,if you don't have it you can go on line and download it from the manufactures website under Downloads Good luck Walter Grzybowski