Vizio D650i-B2 panel tab or tcon?

Collapse
X
 
  • Time
  • Show
Clear All
new posts
  • freelancenoob
    Senior Member
    • Oct 2017
    • 77
    • United States

    #1

    Vizio D650i-B2 panel tab or tcon?

    I was reading the troubleshooting post on here and it says the tcon is responsible for lines on the screen. But I was reading other posts where people were dealing with lines and they were all talking about bad panel tabs.
    Attached Files
  • freelancenoob
    Senior Member
    • Oct 2017
    • 77
    • United States

    #2
    Re: Vizio D650i-B2 panel tab or tcon?

    If it's the panel then I might as well break this tv down and sell the rest of the components. Shame to have to do it though. This tv takes up half the wall in my bedroom. But it was a free tv so im sure i'll come across another in due time. Still have a 60" and a 58" on the bench for repair. I seen videos where people put stuff on the tabs to kind of put pressure on them to make a connection. Not worth it to me. I don't want a temp fix. If I part it out then I have money to put into others that need to be fixed. Right now I've got about 15 flatscreens ive collected from around the area for free all with various problems.

    Comment

    • Davi.p
      Hobbist Tech
      • Sep 2009
      • 4456
      • Italy - Milan

      #3
      Re: Vizio D650i-B2 panel tab or tcon?

      You sell flat tv like bread in USA? Lucky.. i have to pay always.. single or few lines on the screen means that COF chip has lost connection in the output or the internal register has some failing locations (difficult because le lines are black so 3 sub pixel columns consecutive broken), If you put pressure and lines goes away you have the answer. I'm not so sure it is a temp. fix if you do it well also with some that is spreading the heat to the frame, also watch for high ripple from PSU, it can be the source of the problems i think..

      Comment

      Related Topics

      Collapse

      • howardc64
        TCL 55S425 few horizontal lines, potential failure on both side of panel/buffer board
        by howardc64
        All left and right refers to looking from rear of TV (or looking from front with TV upside down)
        • TV came with vertical bars and no image. Found faulty TVS on left buffer board. Also replaced T-Con (may have damaged the original while hot air removing components, board has slight warp) and have full image but few horizontal lines on the screen. Some of the lines appears to be 2 pixel tall while others are 1 pixel tall.
        • Disconnecting left and right buffer board potentially reveals problems on both sides with different signals (unless this T-Con require jumper like Samsung FB_TRDY1&3) Fault
        ...
        07-24-2025, 05:17 PM
      • howardc64
        Vizio M65Q7-H1 Red Vertical Strips fixed by tape blocking LC1 signal to half of the panel
        by howardc64
        Failure Symptom



        No picture, just red vertical stripes. Google search shows quite common problem for these recent Vizio M series although red vertical stripe pattern may differ. Some call it "Netflix" boot screen haha.

        Where is the short?

        Panel has 4x buffer boards. Quickly found the 1/4 panel buffer board with the problem by selectively disconnecting buffer board flex cables.



        Having recently fixed another Vizio with similar symptoms that was a shorted ESD diode array ( link ) Probed the ESD diode array but...
        05-27-2025, 02:56 PM
      • advant
        Driving a Sharp TCON/panel with a universal main board
        by advant
        This thread is about trying to get an Universal Main Board to work with a Sharp TCON and panel.

        I have a Sharp LC-46D85UN TV that has had a main board issue. Since this model is from 2009, I am not able to find an exact replacement of the main board. Instead, I decided to see if I can future proof this tv by getting a Universal Main Board (T53U21.2) from China to work with the Sharp TCON (CPWBX4291TPZA) and panel. The universal main board supports a 8 bit dual channel LVDS interface whereas the TCON requires a 10 bit dual channel LVDS input. I have modded the LVDS connector to match...
        02-03-2020, 12:25 AM
      • iglitare
        Sony KD-75XF9005 grey Picture but Sound. TCON or panel?
        by iglitare
        Hi,

        i want to repair a Sony KD-75XF9005 TV that initially only showed a grey picture.
        Backlight seems to work, Sound (Setup menu after reset) works.
        If i dissconnect the left FFC cable from TCON to panel i have half a screen on the right. If left cable is connected always only the grey screen.
        Interchanged the cables, its always only the right side that is working. Always grey if left side is connected.
        With my small knowledge i would think at least the cables are good.

        Can this happen because of a bad tcon board?
        Or is it always a bad/shorted...
        09-04-2025, 07:13 AM
      • mmartell
        General Questions on the Relationship Between Mainboard, TCON and Panel
        by mmartell
        My goal here is to be able to use boards on hand to swap into faulty sets when the faulty board is not obvious.

        I will start by asking what is the format of the output from the mainboard and is it generic in any way or does it vary by manufacturer and/or model ?

        And as far as I know a tcon and panel must be a matching pair because the timing of the signals and the voltages required to drive the panel are specific to the panel itself. (That may be a blanket statement that isn't true in some cases where the panel creates its own sub-voltages on its panel boards?)...
        01-06-2024, 01:32 PM
      • Loading...
      • No more items.
      Working...