I have a 8-10 year old JVC TV, not sure on exact model number. There is
a black box centered in the screen approximatly 1-2 inches from the
very edge of the screen. The box is 21 inches across by 9 inches.whatever entertainment is actually
displayed on the screen (TV/Xbox/dvds)that's not covered in the box
works correctly, and when the input is changed the box dissappears for
a second and then reappears. when the TV menus are open, you an see
behind the box, but only through the menu box. went through all
functions in settings and all remote functions... The closed caption is off. It makes watching TV impossible.
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My 3-year old 52-inch Toshiba flat panel TV (Model # 52RV53U, Serial # AM409000295) developed a display problem (purchased Aug. 2008, manufactured July 2008). Vertical multicolored lines appeared on the screen just left of center. The band of thin vertical bars is 5.5 inches wide. The lines are about 1/16-inch wide. They are stationary, always exactly in same place. They over-ride any other picture on the screen (no transparency). They are there all time even with no video inputs to the TV after the unit is turned on. See picture #1. The TV works well in every other respect, but, obviously, it is annoying to watch the picture with the color band blocking about 1/6 of the picture.
Further info, pics, comments, and updates on my Facebook page at
I already swapped out the TCON board with no improvement and replugged the TCON board cables with no improvement.
Most likely it is the flat panel tab bond failure (panel made by Samsung). Further solution updates will be on my Facebook page.
I have heard complaints from some of my customers, “There is a black/gray box on my television, but I can still see the picture around the edges”. This happens to all of us and is a common symptom and can be fixed very easily. If you have a black/grey box in the picture, on the older sets they would be perfectly centered on the screen, but, on some of the newer sets the black/grey box can be in different places and can be different sizes on different sets. Most likely the Text mode is on in the Closed Caption menu. The way you can test if it is in Closed Caption Text mode, when you change the channels, the black/ gray box will not appear right away but it will take some time to show back up. This is a very good indication that the Closed Caption “Text” mode is turned on for your television. It just needs to be turned off. To turn off the closed caption go into your menu and turn off closed caption (CC). This will vary from manufacture to manufacture; it should be in the options menu. I have seen on some sets like Mitsubishi puts it under the Video adjustments button. So you may have to look around for it. You may even have a CC button on your remote, which will make it much easier. Just press the CC button until the display indicates that CC it is off. I hope that this tip helps you and that you enjoy your televisions for years to come. Thanks for using FixYa asnowman
This is for the original problem.. Not the second post.
It's a problem in the horizontal deflection circuit. The parts will be available, but you will be in for some daignostic repairs also to find out why it failing or if it has failed on it's own.
There should be a few caps near the IC (an LA7840) that could also be causing the problem. Click the link, it will make it easier to locate the part inside.
This is the kind of repair best left to a TV tech, but get it done now and it won't cost anywhere near as much as it will later.
I am also having problems with the same year and model number panasonic, it is at the repair shop now. I think it is a lemon tv. won't buy panasonics anymore. Tried all the fixes recommended by panasonic. It happens after the tv is on for longer than 1/2 hour. It happens with dvds and different hook ups. my samsung is fine on all the same connections.