e701i-a3 no picture but backlights

Collapse
X
 
  • Time
  • Show
Clear All
new posts
  • freakaftr8
    Badcaps Legend
    • Oct 2012
    • 3743
    • USA

    #261
    Re: e701i-a3 no picture but backlights

    Originally posted by MEM1971
    So on the Vizio 701i-a3e can it be the left side or right side? If I inplug both sides and have some kind of pic I know my transistor and/or tcon is good? Have the Vizios you fixed both been on right side? Im sure I will have to order a transistor. So if tcon is good and have some kind of pic after unplugging both sides and I can not tell which side is the bad side by looking at it, then with the 701i-a3e vizio , I have a 50/50 shot at blowing the transistor. If the vizios u done or know of have been on right side then should that be the first side to check if I cant visually see anything? And by all means do not cut either side off until I know for sure and/or double check here???? Almost at end of my 12 hour shift but will be back here tonight. Thanks to all of you that have figured this out! I think its awesome yall found a fix!

    Yes I fix three of these down to on the right side one on the left side it just is a matter of which side went out first. There are ways of telling at the transistor is good on the tcon or not but that involves probing all the coils on the right side of the board for the different output voltages. If all you're getting is 12 volts in the board and nothing coming out then you know you have a shorted transistor. You can either probe the round coils on the board or you can check the bottom pins of the voltage regulator located on the bottom right side of the board where the output cables go to the panel.
    Did I leave the soldering iron on?

    Comment

    • freakaftr8
      Badcaps Legend
      • Oct 2012
      • 3743
      • USA

      #262
      Re: e701i-a3 no picture but backlights

      Originally posted by budwich
      great work.... funny in my search of failures, you don't see much mention of the sony (ie. large size) versus others... some but not as many... most have had better quality controls as they left the sharp factory... :-)

      PS. I take it back... sony appears to have just as many issues BUT their "complaint" seem to be "shielded" a bit by the fact that sony has their own "community" site where there are lots of complaints but mostly get the "not in warranty response" which leaves those people with "curb side tvs"... :-( if they only knew that they may be able to get some "life" out of their sets. Of course, I suspect a "sony community" site is probably not going to receive a "save advice" readily.
      I totally agree. I'm not sure if it's a quality control issue or not but I'm pretty certain that the panel that you fixed Budwich is the exact same panel installed in this Sony. they're both 3d.

      Actually I take that back yours was a Quattron four color panel and the Sony even though the panel is 3d its still using the standard three color gamut. As far as quality control I think all sharp panels are pretty much built the same way.
      Did I leave the soldering iron on?

      Comment

      • Tmal0146
        Member
        • Oct 2015
        • 18
        • Usa

        #263
        Re: e701i-a3 no picture but backlights

        Has anyone ran into the drivers on the bottom being bad? Just curious if that was a possibility?

        Comment

        • budwich
          Badcaps Legend
          • Jul 2015
          • 3097
          • Canada

          #264
          Re: e701i-a3 no picture but backlights

          all you have to do is read back a few posts and you will get your answer... tab driver failure can happen anywhere a tab driver exists.

          Comment

          • freakaftr8
            Badcaps Legend
            • Oct 2012
            • 3743
            • USA

            #265
            Re: e701i-a3 no picture but backlights

            Originally posted by budwich
            all you have to do is read back a few posts and you will get your answer... tab driver failure can happen anywhere a tab driver exists.
            +1

            On the Vizio I'm sure it will exhibit the same failure of the T CON if a vertical driver failed. However disconnecting side driver boards will not fix this defect. It will most likely blow another board and it will leave you wondering why its doing it
            Did I leave the soldering iron on?

            Comment

            • kevinm34232
              Badcaps Legend
              • May 2012
              • 1884
              • USA

              #266
              Re: e701i-a3 no picture but backlights

              I had this same TV, backlights but no picture. Replaced T-Con, lasted for 2 days then went out again. Suspected panel was bad.

              Comment

              • Tmal0146
                Member
                • Oct 2015
                • 18
                • Usa

                #267
                Re: e701i-a3 no picture but backlights

                Freak... If I do determine the bad drivers to be the ones on the bottom of the panel "the vertical drivers" can I still fix the TV by removing the defective driver like on the side drivers? It doesn't make since to me that it would work for the vertical drivers since there are none on the top of the TV to pick up the slack like the side drivers do.

                Comment

                • freakaftr8
                  Badcaps Legend
                  • Oct 2012
                  • 3743
                  • USA

                  #268
                  Re: e701i-a3 no picture but backlights

                  That is correct. There is no repair for a vertical driver failure . There are only one set of vertical drivers on this panel and removing any of those drivers will render the panel useless. This goes for all LCD panels. No matter the make or manufacturer.

                  Like I said I had one of these panels come in to me via Sony version of the TV and it did have a vertical driver failure. The IC was burned so bad that it almost fell through the ribbon so in turn yes it can happen and is possible.
                  Did I leave the soldering iron on?

                  Comment

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

                    #269
                    Re: e701i-a3 no picture but backlights

                    Vizio 701i-A3E/ Are the vertical drivers on the panel the ones that usually go bad? Thus requiring the vertical side boards having to be pulled off along with the film like strips away from the panel. Forgive me but all the words like bottom, side, etc getting a little confusing. Im going to order the transistor today once I confirm for sure my tcon is out. Do I have to have the upgraded one talked about in this thread?

                    Comment

                    • freakaftr8
                      Badcaps Legend
                      • Oct 2012
                      • 3743
                      • USA

                      #270
                      Re: e701i-a3 no picture but backlights

                      No the vertical drivers are the ones located on the bottom of the panel across the bottom.

                      The side drivers are the ones that are notoriously failing those are located on the left side in the right side sides of the panel.
                      Did I leave the soldering iron on?

                      Comment

                      • johnboy1313
                        Badcaps Legend
                        • Nov 2012
                        • 1959
                        • USA

                        #271
                        Re: e701i-a3 no picture but backlights

                        I have a local guy wanting me to buy the Sony KDL70R550A for $75. He says it shows a picture but it looks like the set in the video linked below. What do you guys think?

                        https://m.youtube.com/watch?v=4ksSo8CmjzY

                        Comment

                        • budwich
                          Badcaps Legend
                          • Jul 2015
                          • 3097
                          • Canada

                          #272
                          Re: e701i-a3 no picture but backlights

                          Odds are very high that it is a side tab failure.... probably "saveable" using the "detach tabs technique" used here.

                          Hey Freakaftr8... told you, this open the door to a whole bunch of "hounds" looking to get a big tv cheap... :-)

                          Johnboy1313... you should probably respond on your youtube post to direct people to badcaps.net to help the many people that are looking for some "savior"... :-)
                          Last edited by budwich; 12-03-2015, 09:09 PM.

                          Comment

                          • johnboy1313
                            Badcaps Legend
                            • Nov 2012
                            • 1959
                            • USA

                            #273
                            Re: e701i-a3 no picture but backlights

                            Originally posted by budwich
                            Hey Freakaftr8... told you, this open the door to a whole bunch of "hounds" looking to get a big tv cheap
                            Not a hound at all. I don't have the room for a TV this size and would never sell it for fear of it failing shortly after. I've been texting with the guy all evening trying to talk him into letting me try to "fix" it for him.

                            Comment

                            • freakaftr8
                              Badcaps Legend
                              • Oct 2012
                              • 3743
                              • USA

                              #274
                              Re: e701i-a3 no picture but backlights

                              That's an odd symptom. Most likely a side left hand driver failure. However it presents itself live a vertical driver failure as well. It's worth a gamble for 75 dollars anyway.
                              Did I leave the soldering iron on?

                              Comment

                              • johnboy1313
                                Badcaps Legend
                                • Nov 2012
                                • 1959
                                • USA

                                #275
                                Re: e701i-a3 no picture but backlights

                                If I do get it and determine that removing the side driver will provide a full picture, I'll likely just part it out anyway. Like I said, I don't have the room (or even the desire) to own a tv this big and it's not sellable as a working TV

                                Comment

                                • budwich
                                  Badcaps Legend
                                  • Jul 2015
                                  • 3097
                                  • Canada

                                  #276
                                  Re: e701i-a3 no picture but backlights

                                  I didn't mean "hounds" in a bad way... more like good... "scent hounds looking for things" The idea is to either save the set for the owner OR the dump... either is good.

                                  Comment

                                  • johnboy1313
                                    Badcaps Legend
                                    • Nov 2012
                                    • 1959
                                    • USA

                                    #277
                                    Re: e701i-a3 no picture but backlights

                                    Originally posted by budwich
                                    I didn't mean "hounds" in a bad way... more like good... "scent hounds looking for things" The idea is to either save the set for the owner OR the dump... either is good.
                                    Right on

                                    Comment

                                    • jim_marilu
                                      New Member
                                      • Nov 2015
                                      • 1
                                      • United States

                                      #278
                                      Re: e701i-a3 no picture but backlights

                                      Originally posted by freakaftr8
                                      I'm just going to go ahead and get this going with a new thread.

                                      As you all know the Vizio model referenced above as a major failure point. There are other members on this forum including myself they have had failures of the Vizio 70 inch model. It represents itself with it was working fine and then the picture went out but the back light stays on. On at least two occasions including myself replacing the t-con board which is the affected problem just blows the board again. There are repair kits for this t-con which includes a DC converter also EEPROM and a few small SMD transistors. First of all it seems the only transistor that gets taken out is the coxa that is directly connected to the small square SMD style IC to the right of the board. This IC is known as the gamma processor.

                                      To my finding the reason that it keeps blowing this one transistor which is usually the only problem on the tcon board is because of a failed horizontal driver tab on the right side of the LCD panel. It appears that usually only one of these tab drivers fail. With this particular set up the main board does not have the ability to shut down the TV in protection mode like some other manufacturers do. The tcon board and the panel are both made by sharp. The problem lies within the driver IC built into the tab on the panel.

                                      If you have this problem and you order a new t-con board, do not and I repeat do not power up the TV with the new board before you try this first. On the right side of the screen, if you're looking at the back side of the TV then look at the bottom left, you will find a small white ribbon cable that connects the side boards of the panel to the bottom boards of the panel. You want to disconnect the white ribbon cable connecting to the right side board you should see the ribbon cable connector on the bottom of the screen on the side. Just disconnect that small white cable. Now you should be safe to power on the TV with the new board. If what has happened to your TV is correct, you will see the screen presented itself with a nice solid bright picture on the left hand side on the right hand side it will be dark, and possibly a little blurry. However you will see as small section spanning horizontally that looks completely normal. And what I mean by normal is that it's just as bright on the right hand side in this small section as it is on the left. Wherever this lies on the screen is in the same area where you have the failed driver.

                                      Now then I don't endorse this as a permanent fix but if you have given up all odds and you're about to throw this TV out in the trash because you cannot make it work anymore many have tried everything, what I did to Repair mine was carefully peel on the right hand side driver tabs directly clean off the panel. Remember this is only done on the side that is causing the failure. A few have had success with this and some have not. I however had excellent success with it so far.

                                      The reason that the t-con board is shorting out is because this is causing a direct overload to an already subpar t-con board.

                                      This was just my fix and remember if you do manage to pull the tab drivers off the panel this is a permanent thing that cannot be reversed.

                                      I will add pictures in a little bit
                                      Hi I have same issue with this 70 inch tv. went ahead and ordered Tcon board replaced it disconnected right side white tab and turned it on. here are the pictures......One thing before I did all this had no picture but did have sound I don't know if its because I had nothing but internet but I had no sound?
                                      Attached Files

                                      Comment

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

                                        #279
                                        Re: e701i-a3 no picture but backlights

                                        Hi freak- sorry it too, so long to get these up, I was on a job with a deadline… anyway the description of the problem is the righthand side having ahadowing on different t-con boards- she said they tried the 2 I sent her and the green one they recieved from encompass that was very warped. I had them clean all connections but still has the apparent shadow. Any ideas? Thanks again!
                                        Attached Files

                                        Comment

                                        • budwich
                                          Badcaps Legend
                                          • Jul 2015
                                          • 3097
                                          • Canada

                                          #280
                                          Re: e701i-a3 no picture but backlights

                                          It appears that they (?) did NOT remove the tab drivers from that side of the screen. You can still see the horizontal line from a bad tab cable. It appears that they just disconnected the corner edge board cable interconnecting the bottom edge boards to the side edge boards. They need to provide you with pictures of the removed edge boards to confirm what they have done... :-)

                                          Comment

                                          Related Topics

                                          Collapse

                                          • Tynan Dill
                                            Vizio e601i-A3 - Has Sound and Display, But No Backlight - Bad Power Supply Board or Bad LED Bulbs ?
                                            by Tynan Dill
                                            I was given this TV from my great uncle. He said it just wouldn't turn on one day out of nowhere, replaced the TV, and gave it to me to possibly fix and use for myself.

                                            Upon bringing it home and plugging it up, it showed a standby light.

                                            I powered it on and without a flashlight, the display showed the "V" but the lighting is very dim, but visible.

                                            The screen seems to blackout and stay black, but with a flashlight I can see the display.

                                            With my Playstation 4 connected via HDMI, and running a game I can hear sound.

                                            Assuming...
                                            11-22-2024, 01:46 PM
                                          • m1ch43lzm
                                            HP Pavilion 15-eh Board DAG7HAMB8F0 - CPU throttling to 0.4GHz (PROCHOT_EXT) and black screen
                                            by m1ch43lzm
                                            Hi, this is my personal laptop, which the original board (lets call it Board A) blew up PU8700 (TPS51486), making a hole on the board, i had left the laptop at my desk one day with the battery fully charged and didn't touch it for a week, but when i tried to turn it on it didn't
                                            Thought the battery was dead, so i plugged in the charger then tried to power on, the power LED blinked once, charged LED still orange, unplugged the charger, plugged in again and I noticed the "magic smoke" smell, so i unplugged the charger, removed the back cover and saw the blown IC (the "magic...
                                            05-12-2025, 08:37 PM
                                          • howardc64
                                            A1312 (27” iMac 2009-2011) A1407 (Thunderbolt Display) A1316 (Cinema Display) Display Black Screen Repair
                                            by howardc64
                                            Problem

                                            This is an LG edge LED lit LCD Display. The LEDs are on the bottom edge of the display. There are 2 bars (left and right) Each bar has many LEDs and a 6 pin connector. Each pin drive several LEDs thus is the highest current flow / heat junction. The weak lead free solder gradually fails with thermal expansion/contraction cycling and increases resistance. PSU will compensate up to a point, then when the current is too high, PSU just shut down the backlight causing a dark display. I have even seen one which the connector just fell off as solder points became completely detached....
                                            08-04-2024, 10:36 PM
                                          • maxim2511
                                            LG 55EC930V OLED - swich on swich of no screen
                                            by maxim2511
                                            My Oled Tv is 55inch tv, 3 days ago I notice that middle of the screen is getting warmer and on picture I have ghosting, missing red color. Color red was still displaying, but it was not so strong as corners of the screen and watching some movies makes me angry.
                                            Then I get an idea to take it apart and clean boards from dust.
                                            In side of Tv was not so bad, I take compressed air in can, and gently blow up.

                                            Also I was thinking to styrofoam sponge to isolate power board from screen that the middle of the screen will not worm so much. Because Led on screen when gets higher...
                                            05-14-2021, 02:21 AM
                                          • Fly_Among_Stars
                                            VIZIO E70-E3 Half picture with half TCON
                                            by Fly_Among_Stars
                                            Hi,
                                            I have a VIZIO E70-E3.
                                            Symptoms: Black screen, no picture, but LED backlights are working.
                                            I probed the power board and voltages are as listed on the board.
                                            Main board appears fine, too.
                                            I believe the problem is either a bad T-CON board, or connection to LCD, or bad LCD.
                                            There are two separate ribbon cables feeding the LCD.
                                            If both are connected, the screen is black.

                                            If only the ribbon cable that feeds the right side of the screen (when viewed from the front) is disconnected, the left side of the screen shows picture and...
                                            04-24-2023, 08:20 PM
                                          • Loading...
                                          • No more items.
                                          Working...