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VIZIO TV (Model:VL370M) Display not working

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    #1

    VIZIO TV (Model:VL370M) Display not working

    Hi everyone! First I'd like to say I'm a newbie here on the forums and as well as repairing electronics so please bear with me. Just for clarification the only experience I have is replacing batteries in iPhones and also don't know how to do soldering. So aside from that I'd like to know if it's possible to repair this TV with no experience/ technical knowledge. The TV is a VIZIO VL370M and had for over 10 years. It was working until one day when I turned on the TV all I see is vertical gray lines and they're also moving across the screen. I've attached some pictures showing it. I have no clue what's the issue with it and would like suggestions on what I can do and if it's repairable. Thank you for the feedback and trying to help me out! Much appreciated to you all!
    Attached Files
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    #2
    Re: VIZIO TV (Model:VL370M) Display not working

    This can happen if liquid gets on the panel and leaks onto the cables with decoders.

    Comment

      #3
      Re: VIZIO TV (Model:VL370M) Display not working

      Do you get a menu?
      I assume no responsibility for any stupid suggestions I might post.

      Comment

        #4
        Re: VIZIO TV (Model:VL370M) Display not working

        Hm I see, haven't spilled anything on or in the TV ever since I had it. Also maybe condensation got inside the TV?

        Also I don't see a menu as it's just gray lines moving across the screen

        Thank you both for for the feedback!

        Comment

          #5
          Re: VIZIO TV (Model:VL370M) Display not working

          Check the LVDS cable, its connectors on T-CON.

          Comment

            #6
            Re: VIZIO TV (Model:VL370M) Display not working

            The good news is this doesn't seem to be a bad panel. But a board or connection issue.
            I assume no responsibility for any stupid suggestions I might post.

            Comment

              #7
              Re: VIZIO TV (Model:VL370M) Display not working

              Ah okay, don’t know where to find that cable but I’ll see if I can open up the TV and then I’ll take pictures of the inside. Also that’s good to hear that the panel might be still good, I was afraid the panel is bad.

              Comment

                #8
                Re: VIZIO TV (Model:VL370M) Display not working

                Hi all I'm back and I got some pictures of the circuit boards on the back of the TV. Let me know if you need more pictures
                Attached Files

                Comment

                  #9
                  Re: VIZIO TV (Model:VL370M) Display not working

                  Here's more
                  Attached Files

                  Comment

                    #10
                    Re: VIZIO TV (Model:VL370M) Display not working

                    On first picture. Remove and check, reseat cable between that board and mainboard. Unhook two cables on bottom of picture one at a time and check tv picture. Turn off tv each time before you disconnect cable.
                    I assume no responsibility for any stupid suggestions I might post.

                    Comment

                      #11
                      Re: VIZIO TV (Model:VL370M) Display not working

                      As per instructions , So I reseated the cable between the board and the main board. After that I unplugged both cables at the bottom. Then I unplugged each bottom cable one at a time and turned on the TV. This is what I got. 1st picture is left cable unplugged and 2nd picture is right cable unplugged.
                      Attached Files

                      Comment

                        #12
                        Re: VIZIO TV (Model:VL370M) Display not working

                        Next I would suggest heating up your mainboard processor. If nothing changes there. It's down to checking voltages. I would start at t-con, first picture. There is VGH,VGL, VCC, VCOM that I see
                        I assume no responsibility for any stupid suggestions I might post.

                        Comment

                          #13
                          Re: VIZIO TV (Model:VL370M) Display not working

                          Um yeah I don’t have a heat gun and don’t know how to do soldering. Sorry if I didn’t mention that before. I was thinking is it possible to replace one of the boards to fix it?

                          Comment

                            #14
                            Re: VIZIO TV (Model:VL370M) Display not working

                            I hope you have a multimeter.
                            I assume no responsibility for any stupid suggestions I might post.

                            Comment

                              #15
                              Re: VIZIO TV (Model:VL370M) Display not working

                              Yeah I actually have a multimeter

                              Comment

                                #16
                                Re: VIZIO TV (Model:VL370M) Display not working

                                Hi there! Just let me know how we proceed using the multimeter, thank you!

                                Comment

                                  #17
                                  Re: VIZIO TV (Model:VL370M) Display not working

                                  Good video there, just be careful what you touch there's DEADLY voltage on the hot side of the powerboard and the inverter, he's checking the voltages in the first part of the video, He is a good teacher, works at a steady pace that even beginners can grasp, consider subscribing and donating: https://www.youtube.com/watch?v=gRDZ...teY5Gw&index=2
                                  Last edited by nomoresonys; 01-30-2022, 04:41 AM.

                                  Comment

                                    #18
                                    Re: VIZIO TV (Model:VL370M) Display not working

                                    Hey everyone, So I have good news I've bought a new tcon board and replaced the broken one and now my TV works again! Yay! for educational purposes I'd like to know why the tcon board is broken. I still took down the voltages of broken and working tcon board in the attached pictures. Also another question is the differences in the tcon boards (top is broken and bottom is working) I've noticed is some of the test points are soldered in the working one as opposed to the broken one, would've me possibly soldering made it work? Just some questions I have as I'd like to get more knowledgeable in this. Thank you for the feedback by the way!
                                    Attached Files

                                    Comment

                                      #19
                                      Re: VIZIO TV (Model:VL370M) Display not working

                                      maybe check all the test points and see if there's any differences if you havent already.

                                      Comment

                                        #20
                                        Re: VIZIO TV (Model:VL370M) Display not working

                                        Looks like VGH is the problem. Should be 20- 30v.
                                        I assume no responsibility for any stupid suggestions I might post.

                                        Comment

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