Black square box pops up in the middle of tv screen.

Your symptoms point to the main board [the board with all the input connections], no simple fix, you must replace the board. Less likely the keypad is bad, just unplug the keypad and see if channel display stops popping up.

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..?

U have the tv original remote wright?Yes.Used ur tv remote look for a button that said CC.Pushes a few times make sure all like CC1,2,3 so on to all off.The black square box show up in the middle of the tv screen,numbers and printting words on the screen it is are call Close Caption for the hearing impair person to read,will disappear from the middle of the tv screen.

Ur tv Closed Captioning is still on like CC 1,2,3 or Text 1,2,3 is on.Look in ur remote control for a button said CC press it make all CC 1,2,3 to all off.Go into memu find closed caption function Text 1,2,3 turn it to all off.These steps,will stop random squares boxes lettering showing up ur tv any channels.

The functions of the Captioning 1,2,3 or Text 1,2,3 is still on.Go into the tv menu turn off all the Captioning like 1,2,3 to off and Text 1,2,3 to off.Will not have anymore black box flash on the middle of the tv screen.

turn off the closed captions - you have it in text mode that will have a big black box with video on the sides
thanks
scott

You have the closed captioning turned on to "Text" mode. Turn off the CC and it will go away.

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

if your big black square starts about the middle of the tv & goes down close to the bottom, you have closed caption text turned on. normal closed caption is small, but test caption, is just a big black box with no writing in it. go into your menu & shut it off, it could even be a button on your remote called, "caption", or "cc". good luck.

i had the same problem with my rca truflat.. i read from a posting of a similar problem with a different tv brand to switch your closed caption options 'off' or set it to a 'cc' option instead of the 't' options.. (this was done through the on-screen menu..) i gave it a try and it worked for my tv.. hope it works for you..