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My 50 inch vizio plasma tv has a 7 inch blue line down the center of the screen and there are a couple white half iunch lines in the center of that. if i hit the input button it will disappear and then the right side of screen will have a couple green vertical lines. then afetr a few seconds, if i dont touch anything, the screen will go back to having the blue line again. if i hit all the buttons and hold them in and just hit different buttons the whole screen will turn solid red the solid blue ,solid white.then the screen will be normal black with a kind of 'ghost' looking images moving around the screen. i was thinking it was the zsus board but not sure. can anyone pooint me in the right direction? i treplaced the logic board and the upper and lower buffer boards as well as the A board.....the one with all the inputs on it. please help

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  • michaelwa814 Aug 06, 2011

    ok, i tested the ysus board by taking the upper buffer out and noticed the toip of the scren is out and then i replaced the upper board and did the same with the lower and then the lower part of the screen goes out.
    this was telling me that the ysus board is working.....or so i thought.
    i also thought if the ysus board is bad then the whole screen would be black altogether.
    and since i have something showing up on the screen then it must be one of the other boards.
    i know this model of vizio has a problem with the ysus boards going bad but since i was seeing the whole screen go from red to blue to white and then seeing the ghosting and the red and blue pixels like snow all over that the ysus board couldnt be the issue...or so i thought.

    the model number is... P50HDM
    now what do you think about what i just stated??
    thanks for your insight as any info is greatly appreciated.

  • michaelwa814 Aug 06, 2011

    ok, i tested the ysus board by taking the
    upper buffer out and noticed the toip of the scren is out and then i
    replaced the upper board and did the same with the lower and then the
    lower part of the screen goes out.
    this was telling me that the ysus board is working.....or so i thought.
    i also thought if the ysus board is bad then the whole screen would be
    black altogether.
    and since i have something showing up on the screen then it must be one
    of the other boards.
    i know this model of vizio has a problem with the ysus boards going bad
    but since i was seeing the whole screen go from red to blue to white and
    then seeing the ghosting and the red and blue pixels like snow all over
    that the ysus board couldnt be the issue...or so i thought.

    the model number is... P50HDM
    now what do you think about what i just stated??
    thanks for your insight as any info is greatly appreciated.

  • michaelwa814 Aug 06, 2011

    so you are saying that both the dual core processors never goes out causing a black screen?
    and your saying only one of the processors are out and thats why the screen is showing some kind of image?
    do you think the ysus needs to be replaced?
    im not sure if i understand your answer.

    thans again

  • michaelwa814 Aug 06, 2011

    my 50 inch vizio P50HDM plasma tv has a 7 inch blue line down the center of the screen and there are a couple white half inch lines in the center of that. if i hit the input button it will disappear and then the right side of screen will have a couple green vertical lines. then after a few seconds, if i dont touch anything, the screen will go back to having the blue line again. if i hit all the buttons and hold them in and just hit different buttons the whole screen will turn solid red the solid blue ,solid white.then the screen will be normal black with a kind of 'ghost' looking images moving around the screen. i was thinking it was the zsus board but not sure. can anyone point me in the right direction? i replaced the logic board and the upper and lower buffer boards as well as the A board.....the one with all the inputs on it. please help

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Hi,

This kind of symptoms is an indication of fault either the Y-sustain or Z-sustain board. Based on the symptoms you've mentioned, there's an instances that the vertical lines appeared on the right side of the screen, I've suspected that the fault came from the Z-sustain board. Replaced this board and its buffer board.

Jdvillanueva

Posted on Aug 07, 2011

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  • Master
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Since the lines are vertical, the image is lost sideways and the corruption changes with the image then clearly this is a sign of Y-Sus failure, not the Z-Sus or the buffer boards.
An logic or input board failure would affect the entire screen, not just a part of it and a failure in one of the buffer boards would affect strictly defined lines of pixels and the defect would be constantly there all the time.
Since you haven't told us the exact model i can't point you to a replacement board.

Posted on Aug 06, 2011

  • Azrael SRL Aug 06, 2011

    In the Y-sus board of this tv there is a basically dual-core processor, each core controlling half of the screen. For the image to be completely absent both cores would have to be completely fried - this never happens. To be honest i never heard of a screen to do something like that before - it looks like a when you access the bootloader, which can't be done without it loaded in a USB memory stick; so it must be a malfunction in the processor. Yes, the fact that the screen lights up completely would indicate a failure in the logic board, but you have already replaced it so it can't be it.

  • Azrael SRL Aug 07, 2011

    both yes.

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