Question about Hitachi 55HDT51 55 in. HD-Ready Plasma Television

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Vertical, pencil-thin blue line appears after 10 minutes of viewing (any source)

This TV is about 20 months old and the problem first began about 3 weeks ago. After about 10 minutes of viewing, a vertical line appears. It originates at the top of the display, 3" from the left edge and extends down approximately 1/2 the height of the screen. The line is about the width of a Sharpie pen and blue color. The line appears in both broadcast and DVD source material. If the TV is turned off for several hours, the line will disappear temporarily. It's very consistent. I discussed this problem with Hitachi customer service. Other than checking and cleaning the control cable connectors that tie the AVC to the display, they're only advice was to call a service center.

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  • Jim Wilgus Jan 03, 2007

    Thanks for the input. I knew it was beyond me after disconnecting and reconnecting the power didn't work! I'm just trying to figure out how serious it is. And, is it a generic problem with this model that the manufacturer should be stepping up to the plate for?

    I'm following another message board of Hitachi owners. This issue has been noted by several posters. Last word is it is a "buffer board" in the panel. I'm waiting word back from one individual who is having his repaired. I will forward his solution here after we know for sure.

  • Jim Wilgus Jan 31, 2007

    2/1/07 Update:
    I called the service center as recommended. They informed me that the problem is likely to be the "buffer board". It is a PC board also known as a "mapping board". Bad news. Even worse. The service center believes the panel itself is bad. Hitachi does not agree and asked me to follow through with the repair agent. He is coming today to get it. Will let you know.

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Have 60 inch sharp television and it has a thin vertical thin blue line running through the screen. what is it the television still has clear picture.

Posted on Aug 02, 2013

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I would suspect a connection breaking down as the set heats up. A shop will probably have to put the set in a stand to hold it while they check for loose connections or defective components inside. Not a DIY job by any means. If this line went completely through the picture either vertically or horizontally and stayed there then this would have indicated a failure in the Panel itself. A thin Line any where on the screen consisting of one pixel in width is a Panel Failure according to Hitachi.

Posted on Jan 01, 2007

  • Bill Heronemus Jan 03, 2007

    Maybe they're talking about one of the "Bus" boards. I can find no mention of a Buffer board in the service manual for this set. Hopefully, when someone gets the set repaired, they will be kind enough to give a part number or location that will enable others to get a quick fix to this problem.

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