Question about JVC AV-48WP30 48" Rear Projection Television

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JVC AV-48WP30 has vertical lines every inch or so...

Recently, my JVC AV-48WP30 started displaying vertical lines every inch or so from the top to the bottom of the screen. They're very, very narrow (about a "pixel" wide, if you will) and affect every input on the unit, including the DVI, component, TV (RF), and S-video inputs. They "modulate", in that they change color, slightly, and intensity, almost like an amplifier or transistor is "clipping". Mostly, they appear white on dark backgrounds and vice versa, and the lines are not solid top-to bottom, but rather like some pixels are on and off in each line. They do not shift side to side at all, and always run full top to bottom. They do _not_ appear on the onscreen menus, however, only on the tv signals. I have _no_ idea what could be wrong, however, and no idea as to where to start looking. Any help would be most appreciated.

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  • CameronE Sep 27, 2007

    The problem lies in the I/P module, which is, unfortunately, a black box according to the service manual (and way, way overpriced to replace).

    Opening it up reveals a very densly populated smd board, and the case is soldered through, making repairs very difficult.

    Seems like something in the filtering circuitry on that board has gone south.

  • Anonymous Nov 26, 2007


    I have the exact same problem as you mentioned except the lines are only on the left 12in or so of the screen. Its not that noticeable with standard input but is pronounced although tolerable with hd signals. You must have taken your set in to have it checked and it sounds like its not worth fixing.

    I already spent about $800 having the set repaired after a lightning strike.

    Anyway, good luck... I'm thinking about dlp next

  • Anonymous Jan 14, 2008

    I have the same problem. Which is the I/P black box? And where can I purchase a new/used/refurb. at? Thanks for the help.

  • shaefferj Jan 02, 2009

    I have the same problem and using the DVD player makes it worse! I wouldn't think this would happen to such an expensive device.



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This may not be the problem but its worth a try:
The plasma display screen is made of a matrix of elements connected to cables along the side and top. On your unit, some of these many, tiny connections are making contact intermittantly thus losing the elements in that area. These contacts are held in place with just pressure and if that is disturbed, you lose that line of elements. Try squeezing the cabinet of the TV on the outside at the top in the area of the loss and see if that makes a difference. May have to go inside and see if the contact assembly is disturbed or warped or something.

Posted on Dec 31, 2007


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Let me say something and also post a few photos.

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