e701i-a3 no picture but backlights

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  • budwich
    Badcaps Legend
    • Jul 2015
    • 3097
    • Canada

    #541
    Re: e701i-a3 no picture but backlights

    you might be able to spot the bad tab driver(s) by looking at them for "hints of abnormal heating". That reduces the guessing and potentially "burning" your tcon. As indicated, if you power up with bad drivers, the tcon could take the hit... if you are fast with disconnecting the power during the testing (ie. disconnecting the small lower corner cables on the panel edge boards), you can prevent the tcon from failing during your testing.

    Comment

    • Tfly
      New Member
      • Sep 2016
      • 2
      • USA

      #542
      Re: e701i-a3 has horizontal black line just starting

      I realize this is probably a sign that this Vizio is going to go black on me..........my line is on the left side of the screen (facing the set) and fades going to the right. How do I know which side drivers to pull.............seems its always the right side but my black line is showing on the left side of the screen........just confused on that point...since my screen isn't all black or blue
      thanks you guys have done a great service to everyone who bought these junkers

      Comment

      • Tfly
        New Member
        • Sep 2016
        • 2
        • USA

        #543
        Re: e701i-a3 no picture but backlights

        Never mind........took 1.5 hours from start to finish and worked perfectly. Left side of a vizio 70 showed a black line but worked otherwise...........removing the drivers eliminated the lines.
        Nice Job guys

        Comment

        • nwcs
          Badcaps Veteran
          • Dec 2015
          • 311
          • usa

          #544
          Re: e701i-a3 no picture but backlights

          I just got this new modified t-con in and was wondering if the added component might be a fix for these. It looks like a resistor.

          Comment

          • Cgmagic
            New Member
            • Sep 2016
            • 2
            • United states

            #545
            Re: e701i-a3 no picture but backlights

            What does this look like to you guys? Did everything everyone has been doing with replacing the tcon and removing right broads as seen on freaks video. Help would be greatly appreciated!
            Attached Files

            Comment

            • mmartell
              Badcaps Legend
              • Oct 2013
              • 3189
              • Canada

              #546
              Re: e701i-a3 no picture but backlights

              Are all ribbons plugged in and seated correctly at the tcon ?

              Comment

              • Cgmagic
                New Member
                • Sep 2016
                • 2
                • United states

                #547
                Re: e701i-a3 no picture but backlights

                Yes everything is seated correctly. I'm hoping it's not a panel issue!

                Comment

                • budwich
                  Badcaps Legend
                  • Jul 2015
                  • 3097
                  • Canada

                  #548
                  Re: e701i-a3 no picture but backlights

                  do yourself and the forum a "favor", feed in a known "test pattern" (get one off a dvd or something... color bars or something like that). Take another picture and we can go from there.

                  Comment

                  • budm
                    Badcaps Legend
                    • Feb 2010
                    • 40746
                    • USA

                    #549
                    Re: e701i-a3 no picture but backlights

                    I use this for test pattern:
                    http://www.majorgeeks.com/files/deta...itor_test.html
                    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

                    • Spookyballs
                      New Member
                      • Sep 2016
                      • 2
                      • USA

                      #550
                      Re: e701i-a3 no picture but backlights

                      Hello Folks,

                      I have been reading this thread over and over for the past week in hopes of fixing an e701i-a3 that I purchased on craigslist for $40. Just observing what has transpired in this thread it is truly awesome how willing everyone is to help each other. Shout out to Freakaftr8, Budwich, TJMethod, Mmartell, and Tom66, you all are great people.

                      Long story short I followed the steps described on here, ran the necessary tests - replaced the T-CON board - and removed the right display drivers. The TV is back to almost full working order with the exception of one vertical column of horizontal lines that constantly jump around within the column and fade in and out. From what I have read on here and after some slight physical testing that I have done i feel that it may have to do with a vertical display driver on the bottom of the panel. However I am a novice and this is the first time I am fixing a TV so I would like some feed back from someone who has a little more experience with these issues.

                      I have attached two pictures:
                      Photo 1 is when its bad Sorry for the photo being upside down.
                      Photo 2 is when it is much less noticeable (look on the right side of the TV)

                      Any Help or insight would be greatly appreciated!

                      TL;DR after replacing the T-Con and removing the right drivers the picture has some horizontal lines in a vertical column that fade in and out, Photos attached. Please Help
                      Attached Files

                      Comment

                      • splatee
                        Senior Member
                        • Jul 2016
                        • 95
                        • USA

                        #551
                        Re: e701i-a3 no picture but backlights

                        Hello,

                        I just picked up E701i-A3 off Craigslist for $50. Following the directions I first unplugged the bottom left ribbon cable and there was no vizio logo. I then plugged that side back in and did the other side and still no vizio logo. I then checked voltage on what I believe to be the correct mosfet and on the single pin side I read 12 volts but on the side with the two pins they both read 0 volts. So am I correct to assume that I will need to replace the mosfet? I guess I would need to order a few of them so when I go back to testing I do not blow them again figuring what side is bad? And would the correct mosfet be RTR020N05TL ?

                        Thank you
                        Attached Files
                        Last edited by splatee; 10-04-2016, 08:01 AM.

                        Comment

                        • splatee
                          Senior Member
                          • Jul 2016
                          • 95
                          • USA

                          #552
                          Re: e701i-a3 no picture but backlights

                          Originally posted by splatee
                          Hello,

                          I just picked up E701i-A3 off Craigslist for $50. Following the directions I first unplugged the bottom left ribbon cable and there was no vizio logo. I then plugged that side back in and did the other side and still no vizio logo. I then checked voltage on what I believe to be the correct mosfet and on the single pin side I read 12 volts but on the side with the two pins they both read 0 volts. So am I correct to assume that I will need to replace the mosfet? I guess I would need to order a few of them so when I go back to testing I do not blow them again figuring what side is bad? And would the correct mosfet be RTR020N05TL ?

                          Thank you
                          Looks like I measured the wrong mosfet. I get 0 volts on all three legs.
                          Attached Files

                          Comment

                          • nwcs
                            Badcaps Veteran
                            • Dec 2015
                            • 311
                            • usa

                            #553
                            Re: e701i-a3 no picture but backlights

                            I found a great seller on ebay that has new tcons for 20.00 but after following all of the steps in this thread I went through 4 tcons and still not working. I just gave up.

                            Comment

                            • splatee
                              Senior Member
                              • Jul 2016
                              • 95
                              • USA

                              #554
                              Re: e701i-a3 no picture but backlights

                              Went ahead and ordered a few mosfets part # RTR020N05 from Mouser. Hopefully should be here tomorrow since they are 45 mins from where I live.

                              Comment

                              • budwich
                                Badcaps Legend
                                • Jul 2015
                                • 3097
                                • Canada

                                #555
                                Re: e701i-a3 no picture but backlights

                                good idea to get a few as you say it may help with the "testing of sides".... and even with your soldering skills... :-)

                                hopefully you can get the things up and running. I would disconnect the corner cables once you have the parts replaced so that you can check the tcon out before attempting to "side test things".

                                Comment

                                • splatee
                                  Senior Member
                                  • Jul 2016
                                  • 95
                                  • USA

                                  #556
                                  Re: e701i-a3 no picture but backlights

                                  Originally posted by budwich
                                  good idea to get a few as you say it may help with the "testing of sides".... and even with your soldering skills... :-)

                                  hopefully you can get the things up and running. I would disconnect the corner cables once you have the parts replaced so that you can check the tcon out before attempting to "side test things".
                                  I already have the side cables replaced. When I was checking each side the backlight would come on but the screen was dim. I did not see the vizio label come up. So after checking the voltage on the presumed mosfet I had 0 volts. What should be the voltages normally? As far as my soldering skills goes this may test them a bit but I am confident I should be able to do it.

                                  Thank you

                                  Comment

                                  • budwich
                                    Badcaps Legend
                                    • Jul 2015
                                    • 3097
                                    • Canada

                                    #557
                                    Re: e701i-a3 no picture but backlights

                                    what I meant to say is have BOTH corner cables removed. That way, IF there are bad drivers, I do believe this should prevent the fet from blowing. then you can measure the voltages there of to see what's up at the card to "semi-ensure" that the card if "functioning" to a degree. As for expected voltages, you will have to check thru the thread as I am sure someone has posted it somewhere.
                                    Last edited by budwich; 10-04-2016, 12:05 PM.

                                    Comment

                                    • splatee
                                      Senior Member
                                      • Jul 2016
                                      • 95
                                      • USA

                                      #558
                                      Re: e701i-a3 no picture but backlights

                                      Originally posted by budwich
                                      what I meant to say is have BOTH corner cables removed. That way, IF there are bad drivers, I do believe this should prevent the fet from blowing. then you can measure the voltages there of to see what's up are the card to "semi-ensure" that the card if "functioning" to a degree. As for expected voltages, you will have to check thru the thread as I am sure someone has posted it somewhere.
                                      Ahh ok. Well when I measured voltages I had the panel ribbons from the t-conn disconnected. I will leave these disconnected after replacing the mosfet and measure the voltages again. Then I will start testing the drivers again per the step by step at the beginning. I will start again with the lower left side.

                                      Thank you

                                      Comment

                                      • splatee
                                        Senior Member
                                        • Jul 2016
                                        • 95
                                        • USA

                                        #559
                                        Re: e701i-a3 no picture but backlights

                                        Ok I have gone ahead and soldered new mosfet onto t-con board. Disconnected the lower right hand ribbon (looking from front of tv). I have a partial vizio V come up. So basically just go ahead and remove the driver tabs on that side of the tv? Now I did not test the other side.
                                        Attached Files

                                        Comment

                                        • splatee
                                          Senior Member
                                          • Jul 2016
                                          • 95
                                          • USA

                                          #560
                                          Re: e701i-a3 no picture but backlights

                                          Removed the side drivers tab and have success. Thank you to everyone for the help and info. Couldn't have done it without you all.
                                          Attached Files

                                          Comment

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