Question about Samsung HP-T4254 42 in. Plasma Television

2 Answers

Video slowly degraded, at first, after being on a few minutes only the bottom half of the screen would be complete snow and after a while it would be good again. Then last week it changed to the entire screen, picture discernalble, but very bad. Now, the video is completely gone, no picture, some pixel action. Not sure if the Plasma goes bad like that or I have a malfunctioning video board?

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  • dharding17 Jun 06, 2010

    The problem exists using both RCA and HDMI cables from different sources.

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  • 63 Answers

Your Y-Buffer Boards are going bad. There are 3 boards here. The Y-Buffer Upper controls the Displays top half, the Y-buffer Lower controls the Bottom half and the Y-SUS/Main controls those 2 boards. Usually when one goes they all go. The Boards are located on the far left of an opened set. They are the skinny boards going up and down. THey are connected directly to the Y-SUS on the right. However you can have good buffer boards and a bad YSUS. I have replaced the buffer boards on sets only to discover it wasn't those boards it was the YSUS

Posted on Jun 30, 2010

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I REPAIRED A PLASMA OF THE SAME SERIES TO NOTICE THAT THE HDMI WAS VERY LOOSE

Posted on Jun 03, 2010

  • Anonymous Jun 07, 2010

    DO YOU HAVE A MULTIMETER AND ARE YOU ABLE TO CHECK VOLTAGES

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