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I have a NEC plasma tv which until recently played dvd/videos etc without problems. It then have lines going across the screen and sometimes just black out on the screen. We had the dvd/video player serviced and it still does the same thing. We have replaced the cables and also same problem. Were using the AV1 port, and tried the AV2 port but no difference. Tried to use the Wii and that also is doing the same thing?? The tv is approx 2 yrs old.

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Hi,
All plasma an lcd TV have boards that control vertical and horizontal output to their respective areas. They are connected to the screen by ribbon cables. If one of these boards fails all together, has a failed chip, a bad connection, or a bad ground somewhere it will result in a black line in the area of that board. A bad ribbon cable connection on the bottom will result in a vertical black bar though the screen. Many times reseating the connection will fix it, if the ribbon cable has been nicked there could be a severed connection. They an sometimes be fixed, but it is a pain. An yes I have done it, but the bar is gone. The same will happen if the chip that outputs to that area opens. The connectors are the first place to look paying close attention to the cable.
Hope this help in solving the problem.Take care.....

Posted on Sep 16, 2010

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Posted on Jan 02, 2017

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