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Vizio VL320M lower horizontal block freezes every few seconds

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    #1

    Vizio VL320M lower horizontal block freezes every few seconds

    Hey there guys! I got a Vizio VL370M LCD, the problem is that when playing video on any of the sources, the lower half of the screen freezes intermittently. It also has one solid line running vertically on the panel slightly to the left of the middle of the panel, and one more exactly on the middle going horizontally. At the intersection of these 2 lines, there are 3 pixels (arranged on the vertical line, with the middle pixel on the horizontal line) which glow red or a solid light color. Here is a video of the symptoms: http://www.youtube.com/watch?v=JnG44C0zcQU

    Now I assume this might be a Tcon problem...But Im worried it might be the panel...

    I also took pictures of what happens when I disconnect one of the T-Cons ribbon cables: But first let me explain a bit, since the pictures dont show the whole tv. (it was a bit cramped :-P) When I disconnect any of the ribbon cables exactly half of the panel (corresponding to the ribbons side) would stop working (displaying white)
    The first 2 pictures are with the right T-con's ribbon cable disconnected-The left side is perfectly fine, except for the vertical and horizontal lines (this time they're alot fainter on the blank white side with the horizontal line being completely white but still visible).
    The second set is with the left disconnected-The whole panel (including the blank white side) shows symptoms that are shown in the youtube video, with only the right have having video
    The third is with the whole Tcon disconnected from the mainboard. The backlight works, and I dont see any dead pixels or anything.
    The rest are pictures of the back of the TV's arrangement.
    One thing I noticed, and it was hard to notice with all the noise I have from the computer and all down here...was that when you listen closley with your ear close to the screen, you can hear the panel (I think its the panel) faintly buzzing when the picture isn't frozen, but when it freezes for a bit, it stops buzzing. Im worried :-C

    Now I was assuming this was a T-Con problem...But im not yet at the level to know for sure :-) I would really value you're input on this :-)
    Thanks alot guys!

    Oh, and the game is sonic adventure for the dreamcast if anyones wondering :-P
    Tags: None
    #2
    Re: Vizio VL320M lower horizontal block freezes every few seconds

    It seems I cant get the pictures up. I will try again later, I keep getting a missing security token error. I hope the video and my description will be enough though

    Comment

      #3
      Re: Vizio VL320M lower horizontal block freezes every few seconds

      Originally posted by Robbiebaby View Post
      It seems I cant get the pictures up.
      See my sig file below for upload picture restrictions.
      --- begin sig file ---

      If you are new to this forum, we can help a lot more if you please post clear focused pictures (max resolution 2000x2000 and 2MB) of your boards using the manage attachments button so they are hosted here. Information and picture clarity compositions should look like this post.

      We respectfully ask that you make some time and effort to read some of the guides available for basic troubleshooting. After you have read through them, then ask clarification questions or report your findings.

      Please do not post inline and offsite as they slow down the loading of pages.

      --- end sig file ---

      Comment

        #4
        Re: Vizio VL320M lower horizontal block freezes every few seconds

        Ok I got it working, I had to do them individually....Weird...Oh well. Here they are. The last picture diddn't work, so there is no picture of the rear arrangement.

        I also took pictures of what happens when I disconnect one of the T-Cons ribbon cables: But first let me explain a bit, since the pictures dont show the whole tv. (it was a bit cramped :-P) When I disconnect any of the ribbon cables exactly half of the panel (corresponding to the ribbons side) would stop working (displaying white)
        The first 2 pictures are with the right T-con's ribbon cable disconnected-The left side is perfectly fine, except for the vertical and horizontal lines (this time they're alot fainter on the blank white side with the horizontal line being completely white but still visible).
        The second set is with the left disconnected-The whole panel (including the blank white side) shows symptoms that are shown in the youtube video, with only the right have having video
        The third is with the whole Tcon disconnected from the mainboard. The backlight works, and I dont see any dead pixels or anything.
        The rest are pictures of the back of the TV's arrangement.

        I could really value this communities input :-) Thanks!
        Attached Files

        Comment

          #5
          Re: Vizio VL320M lower horizontal block freezes every few seconds

          The picture going white is to be expected when one of the driver cables is disconnected. That's not a sign of a faulty panel or T-con.
          The T-con is often the cheapest board to replace, so it may be worth trying it.

          Both of the connectors probably provide a small amount of power to the LCD, possibly explaining why when both are disconnected the screen goes black. Though I'm not 100% sure.
          Last edited by tom66; 10-03-2011, 01:24 AM.
          Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
          For service manual, schematic, boardview (board view), datasheet, cad - use our search.

          Comment

            #6
            Re: Vizio VL320M lower horizontal block freezes every few seconds

            The fact that the screen goes white isn't the problem that I'm having. Its the lower horizontal section of the screen freezing like in the video I posted in the first post.
            I took pictures of what happens when you disconnect the tcon for reference, maybe it will help in diagnosis.

            Comment

              #7
              Re: Vizio VL320M lower horizontal block freezes every few seconds

              Hi, I am new to this and am very glad I found you guys. I have the same problem with my 32" Emerson LCD tv. Only top quarter of the screen works 100% of the time, and the other 3/4 of the screen freezes in various sections (usually middle of the screen, bottom of the screen, then all 3/4 of the screen eventually goes black). I bought a new T-con board, but it still does the same thing. When I tap the tv it sometimes comes on or stops freezing for a second. I have checked all of the connection to make sure there wasn't any loose connection. Not too sure what it is, and cannot find any posts with similar problems. Any help will be truly appreciated.

              Robbiebaby... How did you or have you fixed yours? And what was the problem?

              Comment

                #8
                Re: Vizio VL320M lower horizontal block freezes every few seconds

                I have the same issue. "lower horizontal section of the screen freezing" Did anyone figure out how to fix this?

                Thanks

                Comment

                  #9
                  Re: Vizio VL320M lower horizontal block freezes every few seconds

                  Did you get this fixed?

                  Comment

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