e701i-a3 no picture but backlights

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  • euroryde
    New Member
    • Nov 2015
    • 9
    • USA

    #301
    Re: e701i-a3 no picture but backlights

    Thanks for the great post have read it several times now, but I do have a question in hopes I can figure this out. So after purchasing a new TCON board with both bottom ribbon cables disconnected on the sides I'm just getting vertical lines that do move with menu button and I'm guessing the V logo when starting up but no actual picture. I did connect the bottom right cable and had to replace the coxa chip so before I do anything again this is the point I'm at.

    First photo is when turning on (logo I believe)
    Second when hitting menu/input.
    Attached Files

    Comment

    • freakaftr8
      Badcaps Legend
      • Oct 2012
      • 3743
      • USA

      #302
      Re: e701i-a3 no picture but backlights

      So you have both Tcon ribbons plugged in but the bottom right ribbon cable going to the side boards is connected in the left is disconnected?
      Did I leave the soldering iron on?

      Comment

      • budwich
        Badcaps Legend
        • Jul 2015
        • 3097
        • Canada

        #303
        Re: e701i-a3 no picture but backlights

        Originally posted by euroryde
        Thanks for the great post have read it several times now, but I do have a question in hopes I can figure this out. So after purchasing a new TCON board with both bottom ribbon cables disconnected on the sides I'm just getting vertical lines that do move with menu button and I'm guessing the V logo when starting up but no actual picture. I did connect the bottom right cable and had to replace the coxa chip so before I do anything again this is the point I'm at.

        First photo is when turning on (logo I believe)
        Second when hitting menu/input.
        As freakaftr8 "asks". So you have all the tcon cables connected and then you tried to connect the lower right corner cable... it resulted in the blown "chip". So now once replaced, leave the right corner disconnected but connected the left corner cable, what happens now? To recap, all tcon cables connected, only the left corner (of the panel) interconnect cable connected, right corner interconnect cable disconnected. Things should be OK... no chip blowing and a picture / menu (if selected) should appear.

        Comment

        • euroryde
          New Member
          • Nov 2015
          • 9
          • USA

          #304
          Re: e701i-a3 no picture but backlights

          Yes all tcon cables are plugged in and at this moment neither one of the corners are plugged in, so when I get home today I will now try connecting the left one only and see what happens. Just wasn't sure if with both sides disconnected I should be seeing the lines instead of a faint picture.

          Comment

          • freakaftr8
            Badcaps Legend
            • Oct 2012
            • 3743
            • USA

            #305
            Re: e701i-a3 no picture but backlights

            That's why. You need at least one plugged in on the side. Looks like you can connect the left side safely. Leave right disconnected.
            Did I leave the soldering iron on?

            Comment

            • euroryde
              New Member
              • Nov 2015
              • 9
              • USA

              #306
              Re: e701i-a3 no picture but backlights

              Ok sounds good, thanks. will update.

              Comment

              • tom66
                EVs Rule
                • Apr 2011
                • 32560
                • UK

                #307
                Re: e701i-a3 no picture but backlights

                You will see lines with left and right disconnected as there is no row select signal, so all pixels in any column get set "ON" if that pixel is supposed to be lit at any row/column combo...this is similar to a plasma TV with a Y-buffer fault.
                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

                • johnboy1313
                  Badcaps Legend
                  • Nov 2012
                  • 1959
                  • USA

                  #308
                  Re: e701i-a3 no picture but backlights

                  So I picked up the 70" Sony this evening. The screen has lines and ghosting on the left side. With the left side (from the front) ribbon at the bottom corner disconnected and the right one connected, there are still lines and ghosting on the left side. With the left connected and the right disconnected, there is no picture at all. I also found a burnt IC on the lowest left ribbon. Should I remove the left (from the front) side?

                  Comment

                  • johnboy1313
                    Badcaps Legend
                    • Nov 2012
                    • 1959
                    • USA

                    #309
                    Re: e701i-a3 no picture but backlights

                    I went ahead and removed the side with the burnt IC. I figured if it wasn't that side, I had no hopes of saving it anyway.
                    Attached Files

                    Comment

                    • euroryde
                      New Member
                      • Nov 2015
                      • 9
                      • USA

                      #310
                      Re: e701i-a3 no picture but backlights

                      Ok so update, picture one is with just the left side connected. (did have a little scare when I tried it and nothing showed but realized the ribbon cable wasn't seated right. )

                      So after removing the right side boards and drivers I now have a working TV again..

                      Last two pics of working TV.

                      Thanks again for the help.
                      Attached Files

                      Comment

                      • freakaftr8
                        Badcaps Legend
                        • Oct 2012
                        • 3743
                        • USA

                        #311
                        Re: e701i-a3 no picture but backlights

                        Looks good you guys! Interesting seems to be 75% of everybody has right and failures and the other 25 has left hand. None the less your TVs look great congrats! A couple more saved from the landfill
                        Last edited by freakaftr8; 12-09-2015, 10:03 PM.
                        Did I leave the soldering iron on?

                        Comment

                        • euroryde
                          New Member
                          • Nov 2015
                          • 9
                          • USA

                          #312
                          Re: e701i-a3 no picture but backlights

                          I might have spoken to soon after watching a couple videos on the tv then it developed lines down the screen all the way across and now does not go away. :/
                          Attached Files

                          Comment

                          • tom66
                            EVs Rule
                            • Apr 2011
                            • 32560
                            • UK

                            #313
                            Re: e701i-a3 no picture but backlights

                            Originally posted by euroryde
                            I might have spoken to soon after watching a couple videos on the tv then it developed lines down the screen all the way across and now does not go away. :/
                            Check the LVDS cables from the main board to the T-con are seated right. Also, check the ribbons from the T-con to the panel, especially for tears or damage when they have been manipulated. These cables can be replaced, but it is often a pain to find replacements.
                            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

                            • freakaftr8
                              Badcaps Legend
                              • Oct 2012
                              • 3743
                              • USA

                              #314
                              Re: e701i-a3 no picture but backlights

                              Yeah that looks like a LVDS connection issue to me also definitely not a panel problem
                              Did I leave the soldering iron on?

                              Comment

                              • MEM1971
                                Senior Member
                                • Nov 2015
                                • 53
                                • United States

                                #315
                                Re: e701i-a3 no picture but backlights

                                comes back to a 45v 2a n-channel sot-23 made by ROHM, I ordered 20 that just shipped from TX under $13 and $4 shipping- should have them Thursda.… Can You provide the site info so I can order some?

                                Comment

                                • budwich
                                  Badcaps Legend
                                  • Jul 2015
                                  • 3097
                                  • Canada

                                  #316
                                  Re: e701i-a3 no picture but backlights

                                  Hey Freakaftr8...
                                  lots of "business" on the e70 visio sets, eh!
                                  Just to show you how "popular" (actually unpopular they might be), "tomsguide.com" has over 10 THOUSAND views on the "same troubled sets".... :-( Of course, not all have the same issue but with that many "interested parties", there has got to be a "whole lotta tabbing going on"... :-) :-(

                                  Comment

                                  • freakaftr8
                                    Badcaps Legend
                                    • Oct 2012
                                    • 3743
                                    • USA

                                    #317
                                    Re: e701i-a3 no picture but backlights

                                    You ain't kidding! This seems to be a Sharp 70 inch panel epidemic sadly. But at least there's hope for these. Especially in today's disposable society...
                                    Did I leave the soldering iron on?

                                    Comment

                                    • tjmethod
                                      Senior Member
                                      • Jun 2013
                                      • 137
                                      • United States

                                      #318
                                      Re: e701i-a3 no picture but backlights

                                      Hi Freak and bud I did get them the info to remove the remaining flex tabs but they had been away and are just getting back to the TV. I told them they need to be peeled forward. Because they removed the boards from the tabs and put everything back together, from what they said, the tabs ended up getting pressed between the black plastic and the panel so they tried cutting them away which I would not have done but they did. Now they have half of a screen on the left. Now since there are only tiny parts of the flex tabs still tensing, would this be obviously why there is half a screen and wouldscraping the remaining pieces of the tabs with a razor be ok to get the job done? Hopefully you can you can understand what they told me and I explained it right. As always thanks for your help
                                      Attached Files

                                      Comment

                                      • budwich
                                        Badcaps Legend
                                        • Jul 2015
                                        • 3097
                                        • Canada

                                        #319
                                        Re: e701i-a3 no picture but backlights

                                        :-((((((
                                        looks like maybe a tcon cable not connected... ???? otherwise something didn't go right. I hope they are ONLY dealing with the side tabs and NOT any on the bottom. I don't get a good feeling here.

                                        Comment

                                        • freakaftr8
                                          Badcaps Legend
                                          • Oct 2012
                                          • 3743
                                          • USA

                                          #320
                                          Re: e701i-a3 no picture but backlights

                                          I would probably look into trying to fully remove those tabs if its not A tcon cable that's not seated properly. .But judging on the picture that is working on the one side it looks pretty good I would say that a tcon cable is not seated correctly
                                          Did I leave the soldering iron on?

                                          Comment

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