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Vizio E701A3 No picture

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    #21
    Re: Vizio E701A3 No picture

    sorry so much your wrote but no one photo to show the panel issue..

    low res at ribbon will accrue if the lvds were in place. and the opposite same. let see how the screen loo like.. one photo useful more than 1000 words

    Comment


      #22
      Re: Vizio E701A3 No picture

      Ok this is with everything except the left lower corner connected. As you can tell half the display is out and the wording isn't perfect off color and not crystal clear.
      Attached Files

      Comment


        #23
        Re: Vizio E701A3 No picture

        you need to input a signal to display something. It is possible the menu has nothing on the blank side.

        Comment


          #24
          Re: Vizio E701A3 No picture

          Ok I took some pictures with my firestick hooked up let me upload. as well as a video possibly.

          Comment


            #25
            Re: Vizio E701A3 No picture

            Attached are pictures and video of YouTube from firestick. Sounds work however screen is dark and not clear on one side and blank on other. Only left lower corner ribbon is disconnected when looking from the front or the tv. In these pictures it's at the top left as I have the tv on its side.
            Attached Files

            Comment


              #26
              Re: Vizio E701A3 No picture

              Do not run it too long or you may damage the new T-CON.
              Side Tab (Gate drive) issue.
              Never stop learning
              Basic LCD TV and Monitor troubleshooting guides.
              http://www.badcaps.net/forum/showthr...956#post305956

              Voltage Regulator (LDO) testing:
              http://www.badcaps.net/forum/showthr...999#post300999

              Inverter testing using old CFL:
              http://www.badcaps.net/forum/showthr...er+testing+cfl

              Tear down pictures : Hit the ">" Show Albums and stories" on the left side
              http://s807.photobucket.com/user/budm/library/

              TV Factory reset codes listing:
              http://www.badcaps.net/forum/showthread.php?t=24809

              Comment


                #27
                Re: Vizio E701A3 No picture

                Side tab?? what would be the corrective action. Note all the pictures left corner ribbon is disconnected..

                Comment


                  #28
                  Re: Vizio E701A3 No picture

                  https://www.badcaps.net/forum/attach...8&d=1597195432
                  This picture, what are those two black cloud like in the green back ground, is that a an image or black cloud smear. Is it supposed to solid green picture?
                  I do nit see these two patches of black clouds in this one:
                  https://www.badcaps.net/forum/attach...4&d=1597195432

                  May be use solid color back ground for the whole screen to make it less confusion.
                  Some thing shorted in the panel that took out the parts on the T-CON.
                  Check the RESISTANCE of those LYTICS and MLCC I marked.
                  Can you also read the P/N of that LCD Bias IC301?
                  Attached Files
                  Last edited by budm; 08-11-2020, 10:12 PM.
                  Never stop learning
                  Basic LCD TV and Monitor troubleshooting guides.
                  http://www.badcaps.net/forum/showthr...956#post305956

                  Voltage Regulator (LDO) testing:
                  http://www.badcaps.net/forum/showthr...999#post300999

                  Inverter testing using old CFL:
                  http://www.badcaps.net/forum/showthr...er+testing+cfl

                  Tear down pictures : Hit the ">" Show Albums and stories" on the left side
                  http://s807.photobucket.com/user/budm/library/

                  TV Factory reset codes listing:
                  http://www.badcaps.net/forum/showthread.php?t=24809

                  Comment


                    #29
                    Re: Vizio E701A3 No picture

                    Originally posted by Euroxs4 View Post
                    Ok so I this configuration with new tcon board installed I have 9.4k ohms. That's good with ribbons connected to lcd panel but nothing connected from main board and corner ribbon disconnected. However with the left corner ribbon connected it reads 1300ohms so It looks like the left side is the issue correct??

                    Also I did a dry run L lower corner cable disconnected. Both ribbons to tcon connected and both ribbons to lcd panel connected The menu works however right side of the screen does not display anything. Any ideas??
                    OK... at least you don't have "fire" any more... :-)
                    So the first question: Previously, you indicated that the main didn't put out 12v on one of the places that you tested with the old main (of course, you had no picture at that point)... redo that check. Second point / question: in the subsequent pictures, it is hard to tell if it is exactly half a screen or not because of the perspective, can you measure / confirm half a screen?

                    Lastly, can post a close up of the corner cable that is disconnected showing where it is connected normally. Finally, I was expecting more of a picture on the "half" that was disconnected but I am not sure that anyone with this particular model has ever tried the "corner cable" disconnected to see the result... may only just to see that the fet's do not blow any more. As suggested by budm, do some more checks on / near that side. I am concerned that the output of the tcon for that side is not being driven properly at this point.

                    Comment


                      #30
                      Re: Vizio E701A3 No picture

                      Yes I made those same checks with new main board installed. Still not getting 12v on one channel going to TCON board. I did also disconnect the right corner ribbon cable,it was a pain to get it back in as I didnt remove the metal framing on the side perhaps I need to check to see if that corner is seated all the way?

                      I'm also thinking possibly issue with PS board. I did resolder 2 yellow F105 MPB'S. I believe they are capacitors. I think I even swapped 2 to a different location on the board as they all had the same markings. I resoldered 2 connections on the PS board as before I didnt have the backlight coming on. So the issue may be there.

                      Since were are on that subject. This doesn't seem right to me, 2 of the F105 450MPB capacitors correct me if I'm wrong read open all the time yet others show a resistance value. These 2 in question are the 2 I swapped that I thought were no good but It seem as whatever I swap into that spot on the PS board seems to read open. Could my issue be with the board??

                      I think I should go over whatever I did up to this point and double check everything. So I will check the right corner cable and solder joints on the PS board. If all that is good I need to check if I have 12v coming out of PS board to the main board for that half of the screen.

                      In the pictures you cant tell but yes I'm almost 100% its exactly half the screen.

                      BUDM the clouds you see are part of the advertisement being shown not on the screen itself.The picture should be whitebackground with something in the middle I dont remember what it was for. I will try to output a solid color to the tv tonight when i get home.

                      I will disconnect all cables from the TCON and do the resistance check on those lytics. Thank you for your help.
                      Last edited by Euroxs4; 08-12-2020, 07:01 AM.

                      Comment


                        #31
                        Re: Vizio E701A3 No picture

                        :-( you need to go back to the main card and track / trace the 12v "origination". Having a totally back screen would indicate a lack of powering to that side which would likely mean nothing coming from tcon.

                        Comment


                          #32
                          Re: Vizio E701A3 No picture

                          Originally posted by Euroxs4 View Post
                          Attached are pictures and video of YouTube from firestick. Sounds work however screen is dark and not clear on one side and blank on other. Only left lower corner ribbon is disconnected when looking from the front or the tv. In these pictures it's at the top left as I have the tv on its side.
                          Can you re-confirm / re-state this... sorry. You said looking from the front of the TV, the left corner cable of the panel is disconnected.... yet you are showing no picture on the right.... ????? This is somewhat not expected. Also back to your other statement about 12v not being sent... which side is that associated with ... with respect to the front of the tv. Sorry for my confusion.

                          Comment


                            #33
                            Re: Vizio E701A3 No picture

                            Originally posted by budwich View Post
                            Can you re-confirm / re-state this... sorry. You said looking from the front of the TV, the left corner cable of the panel is disconnected.... yet you are showing no picture on the right.... ????? This is somewhat not expected. Also back to your other statement about 12v not being sent... which side is that associated with ... with respect to the front of the tv. Sorry for my confusion.

                            Yes correct looking at the tv from the front left corner ribbon is disconnected. Also looking at the tv from the front right portion of the tv screen is blank.I think because I am not getting 12v on half the TCON board hence why that portion of the screen is blank. I will need to look at power supply board to see if its sending 12 volts out to that channel but if i remember correctly it never was since I got the tv.

                            I also had the corner ribbon on the right side disconnected before anything was changed or replaced, perhaps its not seated all the way,but I think like you said the issue now is why right side of the screen is blank. I need to look at power supply board to see if it putting out 12v.

                            Comment


                              #34
                              Re: Vizio E701A3 No picture

                              Here are pictures of the power supply board. In one of the pictures you can see where the solder cracked and pin was lifted/separated from the base.
                              Attached Files

                              Comment


                                #35
                                Re: Vizio E701A3 No picture

                                mine eyes aren't that good. sorry. can post your "medium" closeups (clear) of the connector areas at the power board and again at the main board (only those connectors related to the main / power / tcon... so the forum can see the labeling clearly.

                                One other thing to confirm / clear up now that you say the left side cable is disconnected.... when you did your resistance test / check, the right side was always good, right?

                                Comment


                                  #36
                                  Re: Vizio E701A3 No picture

                                  i have problem with all yours photos.. and the corner ribbon cable i didn't catch the meaning.
                                  but if you by any chance removed the U ribbon from the effected side for testing.. you may put it back in opposite way. check this again..

                                  Comment


                                    #37
                                    Re: Vizio E701A3 No picture

                                    https://www.badcaps.net/forum/attach...1&d=1597256844
                                    The Yellow caps marked with 101, 113 are for the PFC Voltage booster, the other 3 are for the backlights circuit, so those are not the problem. If PFC is not working the main power supply and the backlights circuits will not work.

                                    Can I see good clear pictures of the main board and also closed up pictures around the LVDS connector on the main board so I can see if the switched 12V's for the T-CON is damaged when the parts blew up on the T-CON.
                                    Also pictures of the whole backside of the TV showing all the board.
                                    Never stop learning
                                    Basic LCD TV and Monitor troubleshooting guides.
                                    http://www.badcaps.net/forum/showthr...956#post305956

                                    Voltage Regulator (LDO) testing:
                                    http://www.badcaps.net/forum/showthr...999#post300999

                                    Inverter testing using old CFL:
                                    http://www.badcaps.net/forum/showthr...er+testing+cfl

                                    Tear down pictures : Hit the ">" Show Albums and stories" on the left side
                                    http://s807.photobucket.com/user/budm/library/

                                    TV Factory reset codes listing:
                                    http://www.badcaps.net/forum/showthread.php?t=24809

                                    Comment


                                      #38
                                      Re: Vizio E701A3 No picture

                                      Originally posted by budwich View Post
                                      Can you re-confirm / re-state this... sorry. You said looking from the front of the TV, the left corner cable of the panel is disconnected.... yet you are showing no picture on the right.... ????? This is somewhat not expected. Also back to your other statement about 12v not being sent... which side is that associated with ... with respect to the front of the tv. Sorry for my confusion.
                                      That is confusing to me too.
                                      Never stop learning
                                      Basic LCD TV and Monitor troubleshooting guides.
                                      http://www.badcaps.net/forum/showthr...956#post305956

                                      Voltage Regulator (LDO) testing:
                                      http://www.badcaps.net/forum/showthr...999#post300999

                                      Inverter testing using old CFL:
                                      http://www.badcaps.net/forum/showthr...er+testing+cfl

                                      Tear down pictures : Hit the ">" Show Albums and stories" on the left side
                                      http://s807.photobucket.com/user/budm/library/

                                      TV Factory reset codes listing:
                                      http://www.badcaps.net/forum/showthread.php?t=24809

                                      Comment


                                        #39
                                        Re: Vizio E701A3 No picture

                                        Well It looks like I am back to square one. I hooked up the left lower corner ribbon cable with one of the channels at the TCON disconnected I now have no picture on the whole screen. Im guessing I cooked the new TCON. Although when performing resistance check at cathode still shows 9.41kohms which mean good but who knows if anything else blew on the board.I also flipped the tv over to look at the right side corner ribbon that I had remove previously and found that one of the pins is damaged/separated from the ribbon. So I wonder if that was my issue.

                                        However when checking voltages at power board everything from power board to main board was being sent. Just 1 channel was dead from the main to the tcon. The main is not sendin anything out on one channel. I will post locse up pictures shortly. I will order another tcon in the mean time.

                                        Comment


                                          #40
                                          Re: Vizio E701A3 No picture

                                          Here are some of the pictures.
                                          Attached Files
                                          Last edited by Euroxs4; 08-12-2020, 08:13 PM.

                                          Comment

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