I turned the TV on today and all I heard was " noise " that you usually hear when you have a " snowy " picture. I looked up at the screen and there were 2 white lines, 1 horizontal and 1 vertical about 1/4" inch thick that formed a cross ( + ). I disconnected the digital cable box to make sure it had nothing to do with it. I turned the TV on and off manually and still have the problem. Hope you can be of some assistance....Mike
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Re: lines on screen
Can you take a picture of the screen and post it? It is not possible for both the horizontal and vertical stages to fail at the same time to produce a cross. A picture of the screen would help significantly.
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There are two reasons for this fault. A fault smoothing capacitor at the video output voltage rail, or excess of screen voltage. These lines are called 'vertical retrace lines' technically. Check this link for more details. It has a post, which have information regarding this fault. Go to older posts there.
Hello, I have exactly the same problem with the exact same TV, white screen for about 15 minutes and than image appears perfect as if nothing happened. I have asked an ebayer which sells TV parts and he suggested it could be a main board or tcon board. I am quiet hesitant to fix my tv, but if the tcon board would fix it, i'd go for it. Did You manage to solve the problem yet?
You didn't mention if you saw fine white diagonal lines running through the screen from top to bottom. If so, you likely have a shorted Picture Tube which is not usually fixable. If there are no lines seen running through the screen, then it is possible the High voltage transformer which also has a screen voltage and focus control built in that could be bad. I would expect the cost of that part to be about $100, so the repair cost total could approach that of a new set I would guess.