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vizio v037l fhdtv20a no picture

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    vizio v037l fhdtv20a no picture

    Hello I have a vizio v037l fhdtv20a that has no picture or sound. The vizio light changes from amber to white when I power it on but thats it. I have 1.5 vdc to the a and b pins going to the main board and inverter. I have 5vdc on the pins to main board but no 12vdc or 24vdc. I have nothing at the pson. I jumped the 5vdc to the pson and then I had all my power. I dont know where to go from here.

    #2
    Re: vizio v037l fhdtv20a no picture

    Originally posted by beer-b-q View Post
    Hello I have a vizio v037l fhdtv20a that has no picture or sound. The vizio light changes from amber to white when I power it on but thats it. I have 1.5 vdc to the a and b pins going to the main board and inverter. I have 5vdc on the pins to main board but no 12vdc or 24vdc. I have nothing at the pson. I jumped the 5vdc to the pson and then I had all my power. I dont know where to go from here.
    Sounds like the mainboard isn't turning the PSU on.
    Muh-soggy-knee

    Comment


      #3
      Re: vizio v037l fhdtv20a no picture

      Yep check the fuses on the main board as well as the voltage regulators, as per Vizio usual...

      Comment


        #4
        Re: vizio v037l fhdtv20a no picture

        Check all your voltage regulators on the main board. Vizios have problems with them failing. My sig file below has details.
        --- 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


          #5
          Re: vizio v037l fhdtv20a no picture

          Do you know how many I have I can only find one.

          Comment


            #6
            Re: vizio v037l fhdtv20a no picture

            Upload a good pic of the main board

            Comment


              #7
              Re: vizio v037l fhdtv20a no picture

              Here are some
              Attached Files

              Comment


                #8
                Re: vizio v037l fhdtv20a no picture

                The second pic f3 is not good.

                Comment


                  #9
                  Re: vizio v037l fhdtv20a no picture

                  Originally posted by beer-b-q View Post
                  Do you know how many I have I can only find one.
                  You have at least 8. Report your findings exactly in the format as described in the how to test a voltage regulator link.
                  Attached Files
                  --- 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


                    #10
                    Re: vizio v037l fhdtv20a no picture

                    Originally posted by beer-b-q View Post
                    The second pic f3 is not good.
                    A good fuse should measure less than 1.0 ohms.
                    --- 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


                      #11
                      Re: vizio v037l fhdtv20a no picture

                      The f3 OL.
                      U17
                      1. 2.08
                      2. 3.33
                      3. 5.02

                      U22
                      1. 2.07
                      2. 3.32
                      3. 5.07

                      U20
                      1. .558
                      2. 1.80
                      3. 3.306

                      U15
                      1. 2.086
                      2. 3.33
                      3. 5.02

                      U21
                      1. .6
                      2. 1.240
                      3. 2.514

                      U19
                      1. 1.12
                      2. 2.515
                      3. 5.02

                      U44
                      1. 2.5
                      2. 2.9
                      3. 3.2

                      I need help finding fuses.

                      Comment


                        #12
                        Re: vizio v037l fhdtv20a no picture

                        Repost with the part numbers included. Without them, we have no 100% way of verifying if they are good or bad.
                        --- 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


                          #13
                          Re: vizio v037l fhdtv20a no picture

                          F3 is OL? That sounds like a problem. Can you check the DC volts on each end, relative to case.
                          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


                            #14
                            Re: vizio v037l fhdtv20a no picture

                            U17
                            l112
                            g1117
                            1. 2.08
                            2. 3.33
                            3. 5.02

                            u22
                            l112
                            g1117
                            1. 2.07
                            2. 3.32
                            3. 5.07

                            u20
                            1084
                            0917al
                            1. .558
                            2. 1.80
                            3. 3.306

                            u15
                            1084
                            0917al
                            1. 2.086
                            2. 3.33
                            3. 5.02

                            u21
                            l112
                            g1117
                            1. .6
                            2. 1.240
                            3. 2.514

                            u19
                            l112
                            g1117
                            1. 1.12
                            2. 2.515
                            3. 5.02

                            u44
                            119cg
                            1117l
                            1. 2.5
                            2. 2.9
                            3. 3.2

                            Comment


                              #15
                              Re: vizio v037l fhdtv20a no picture

                              5.03dcv on both sides of f3.

                              Comment


                                #16
                                Re: vizio v037l fhdtv20a no picture

                                Originally posted by beer-b-q View Post
                                u21
                                l112
                                g1117
                                1. .6
                                2. 1.240
                                3. 2.514

                                u19
                                l112
                                g1117
                                1. 1.12
                                2. 2.515
                                3. 5.02

                                u44
                                119cg
                                1117l
                                1. 2.5
                                2. 2.9
                                3. 3.2
                                Recheck/remeasure the 3 above. All are suspicious readings.
                                --- 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


                                  #17
                                  Re: vizio v037l fhdtv20a no picture

                                  u21
                                  l112
                                  g1117
                                  1. .6
                                  2. 1.240
                                  3. 2.514

                                  u19
                                  l112
                                  g1117
                                  1. 1.12
                                  2. 2.515
                                  3. 5.02

                                  u44
                                  119cg
                                  1117l
                                  1. 2.5
                                  2. 2.9
                                  3. 3.2
                                  THESE WERE MV

                                  I found another
                                  U16
                                  AZ7805T
                                  E1
                                  904D08
                                  1. 3.3
                                  2. .4
                                  3. .4
                                  mv

                                  Comment


                                    #18
                                    Re: vizio v037l fhdtv20a no picture

                                    The readings are in millivolt? All of them?
                                    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


                                      #19
                                      Re: vizio v037l fhdtv20a no picture

                                      No just u44 and u16.

                                      Comment


                                        #20
                                        Re: vizio v037l fhdtv20a no picture

                                        I cannot spot any fault with the regulators. Is there an additional fuse on the board?
                                        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

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