Partially repaired Vizio E701-A3, need help!

Collapse
X
 
  • Time
  • Show
Clear All
new posts
  • evanroheff21
    Member
    • Aug 2016
    • 45
    • USA

    #1

    Partially repaired Vizio E701-A3, need help!

    Hello everyone,

    I have an E701-a3 (notoriously risky) that I picked up for $50 with no mainboard (I don't know the backstory very much, the people that sold it weren't too talkative so I don't know much about how it ended up in that state.).

    So, bought a replacement board on eBay, hooked it up, and ... TV powered on to lit black screen, but no output on the TV. Did some research, and of course came across the large e701i-a3 thread here: https://www.badcaps.net/forum/showth...t=e701&page=47. I've read that entire thread, and tested the panel for resistance according to the post on page 45 (post #916 I think?).

    Came to the conclusion my T-con was toast but the panel seemed ok on the resistance checks (in hindsight, I think my t-con was toast and this test was not accurate). Bought a replacement t-con off of eBay listed as "new"....which was not. Anyway, plugged it in, disconnected the very bottom right (as looking at the tv to watch it) 3/4" ribbon cable, and powered it up. Got some garbled output to the screen for a while, assumed things were in good shape as far as the panel, so hooked it all back up and tried to fire up the TV again. No dice, black illuminated screen only. At that point, never could get the TV to show any sort of image after that while the ebay board was installed, seemingly popped the little transistor.

    So, bought a 10-pack of the tiny transistors (COXA) and a better soldering iron. Replaced it on both t-con boards (the original with the TV, and the "new" ebay one). Checked panel resistance with the original board in place, and resistance test clearly showed that the right side of the panel (as viewed to watch TV) was problematic. Powered up the set with that side disconnected, and the T-con seemed to be working somewhat...but distorted/funky.

    Decided I was confident enough that the right-side of the panel was my problem point. Drivers on the side ribbon cable/tabs visually looked fine, no obvious burned ones. Peeled off all 5 tabs from the LCD panel to the side driver boards. Hooked everything back up and fired up the set. Now I'm getting bright, evenly illuminated lines on all parts of the TV (not half of the screen, which is good), however it's just a garbled mess.

    The attached pictures show as the TV boots up, pressing the menu button, pressing the "Vizio" button to load smart app menu, trying to change the input, etc.

    I thoroughly cleaned the t-con ribbon cables as they'd been on and off probably 20 times in troubleshooting over a few weeks. Tried the 'ebay' (now repaired) t-con and it seems totally dead (just the black, illuminated screen).

    What should I try next? Do I need to re-repair my t-con? Buy a new (3rd) t-con again? I don't know 100% that my repair on the ebay board was a success, I may remove and re-solder that one (those chips are TINY!).

    Looking for any suggestions as to a way to salvage this set if possible. I can send a known test image in to the set if that's helpful. I have a multimiter and soldering iron and 8 more little replacement transistors. Thanks!
    Attached Files
  • evanroheff21
    Member
    • Aug 2016
    • 45
    • USA

    #2
    Re: Partially repaired Vizio E701-A3, need help!

    Has anyone had a similar image on their 60 or 70" Vizio model to this? Was a new t-con sufficient to fix it or is this one toast? I plan on ordering one more "new" (according to ebay) t-con board, which I'll just return if it doesn't fix things. I'd love to hear if anyone else has been at this specific point and what the outcome was.

    Comment

    • Charleyd
      Member
      • Aug 2016
      • 42
      • United States

      #3
      Re: Partially repaired Vizio E701-A3, need help!

      I had a slightly similar scenario. After I replaced the transistor and removed the side tabs, I had one half of the screen working good (the side with the side tabs still connected) but the other half messed-up sort-of like yours. A new T-Con corrected the the situation. (I bought a T-Con identified as "New".) You should be able to find a T-Con for $15-20 on eBay.

      Comment

      Related Topics

      Collapse

      • 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
      • x_orange90_x
        TCL 50S535 bad tcon or panel issue?
        by x_orange90_x
        Just bought this for 10 bucks yesterday hoping to fix it. The guy said water dropped inside from a dehumidifier hose and it started showing black and white vertical bars then went blank. When I got it home and turned it on it came on fine and displayed correctly but I was noticing faint vertical bars in the image. After a little bit I turned it off and back on and it was a black screen again. I opened it up to check for water damage and corrosion but didn't find anything of the sort. I cleaned the ribbons anyway and reconnected them but still got a blank screen. If I disconnect the right side...
        03-29-2025, 11:02 PM
      • 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
      • advant
        Driving a Sharp TCON/panel with a universal main board
        by advant
        This thread is about trying to get an Universal Main Board to work with a Sharp TCON and panel.

        I have a Sharp LC-46D85UN TV that has had a main board issue. Since this model is from 2009, I am not able to find an exact replacement of the main board. Instead, I decided to see if I can future proof this tv by getting a Universal Main Board (T53U21.2) from China to work with the Sharp TCON (CPWBX4291TPZA) and panel. The universal main board supports a 8 bit dual channel LVDS interface whereas the TCON requires a 10 bit dual channel LVDS input. I have modded the LVDS connector to match...
        02-03-2020, 12:25 AM
      • EazyBone
        Vizio P759-G1, Tcon issue?
        by EazyBone
        Got this TV free. Guy said it tries to turn on and doesn't. I haven't seen this specific issue before but shown in video. Any way to test the screen to rule it out on these Vizio? Or anyone seen this issue before?

        Any help appreciated

        https://youtu.be/tPeV2Q7TXIQ?feature=shared
        03-22-2024, 03:25 PM
      • Loading...
      • No more items.
      Working...