Vizio E65-E3 Dead after backlight replacement

Collapse
X
Collapse
+ More Options
Posts
 
  • Time
  • Show
Clear All
new posts
  • RDC55
    Senior Member
    • Dec 2017
    • 180
    • United States

    #101
    Re: Vizio E65-E3 Dead after backlight replacement

    Originally posted by a460guy
    meter is a Fluke 87v

    see post #31 for pics....3 wire connector feeds 2 strips that clip together. red wire goes to both strips....white to 1st strip, black to 2nd.
    Yes, that is one of the meters that supposedly puts out enough voltage to forward a 6V LED. That's a very pricey meter and you won't find many having that in their tool box. I looked at the spec sheet for the meter but couldn't quite nail down what the voltage was but in the thread below it is stated as 7.9VDC.

    https://www.eevblog.com/forum/beginn...ge-components/

    I finally found a thread where someone actually measured the LED voltage on the E65-E3, not sure why I had trouble finding it but it suggests measured voltage should be 42V, which seems very reasonable.

    https://www.reddit.com/r/VizioTV/com...ong_will_they/

    Comment

    • a460guy
      Senior Member
      • Oct 2013
      • 59
      • it's

      #102
      Re: Vizio E65-E3 Dead after backlight replacement

      Well Tv has been on for about 45 mins now with no shut down issues. I think we did it!! You guys are Awesome!!! Thanks for your help!

      Comment

      • budm
        Badcaps Legend
        • Feb 2010
        • 40746
        • USA

        #103
        Re: Vizio E65-E3 Dead after backlight replacement

        Great, so can you do the conclusion as to what is done and replaced since the thread got very long? Thanks.
        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

        • a460guy
          Senior Member
          • Oct 2013
          • 59
          • it's

          #104
          Re: Vizio E65-E3 Dead after backlight replacement

          ok so after replacing the backlights on this E65-E3 vizio, the tv would turn on but there was no voltage going to the led strips. after pulling off every cap, mosfet, and diode on the powerboard i could not find the fault. im sure i missed something as i have not been classically schooled in electronic diagnosis. i ordered a powerboard from a e70-e3 (because they were going for 1/4 the price of the 65). once installed the backlights would shut off every so often (due to them being over juiced from the higher output powerboard. So i removed a capicator at C1, swapped transformer at T301 and swapped resistors at r317 and r318. also removed r319 that made both boards identical.
          There was also a pretty heated discussion about zener diodes in this thread. Thanks to all who contributed!!

          Comment

          • J F Thomas
            New Member
            • Jun 2014
            • 5
            • United States

            #105
            Re: Vizio E65-E3 Dead after backlight replacement

            Thanks for the clarification concerning the red white and black wires. Believe it or not, I checked ALL 12 strips by connecting my LED supply (via + on red and - on black or white as was appropriate) and NOT even one strip would come on. I will be opening the light box soon and hope to be able to report my find.

            Comment

            • gavric
              Senior Member
              • Jun 2011
              • 65

              #106
              Re: Vizio E65-E3 Dead after backlight replacement

              Originally posted by J F Thomas
              Thanks for the clarification concerning the red white and black wires. Believe it or not, I checked ALL 12 strips by connecting my LED supply (via + on red and - on black or white as was appropriate) and NOT even one strip would come on. I will be opening the light box soon and hope to be able to report my find.


              update_

              Comment

              • Mitike
                New Member
                • Jan 2020
                • 9
                • United States

                #107
                Re: Vizio E65-E3 Dead after backlight replacement

                Originally posted by a460guy
                ok so after replacing the backlights on this E65-E3 vizio, the tv would turn on but there was no voltage going to the led strips. after pulling off every cap, mosfet, and diode on the powerboard i could not find the fault. im sure i missed something as i have not been classically schooled in electronic diagnosis. i ordered a powerboard from a e70-e3 (because they were going for 1/4 the price of the 65). once installed the backlights would shut off every so often (due to them being over juiced from the higher output powerboard. So i removed a capicator at C1, swapped transformer at T301 and swapped resistors at r317 and r318. also removed r319 that made both boards identical.
                There was also a pretty heated discussion about zener diodes in this thread. Thanks to all who contributed!!
                so I did all what mentioned above and still did not turned on the LEDs however I did try to put an E80-E3 main board and it starts right up and LEDs on
                (the picture is shifted and stuff like that but I guess its because the E80 is programmed for a T-CON with 4 output)

                anyway the red wires from the mother board to the LEDs is all having the right output voltage but no GND (I assume its a low side switch circuit) while I was testing the LED switch transistors for GND continuity I placed the multimeter's (+) on the frame and the (-) on the transistor and the controlled strip by that specific transistor is came on.

                My question is that I have a bad LED controller chip on the board ?
                If yes how can I test that?
                If no, anybody out there which way to go from here because I feel like I'm close to a fix here??

                (Also there is picture and sound just no background LED,, LED strips tested good with external LED tester, Power supply needed to be replaced, set did not came on at all previously)
                Attached Files

                Comment

                Related Topics

                Collapse

                • SS454
                  vizio e650i-a2 backlight flashes then turns off
                  by SS454
                  vizio e650i-a2 (LWJAOZBP Serial) led backlight flashes then turns off, has video (via flashlight) and audio.

                  panel: au optronics T650HVN05.4
                  72 led total on 12 strips, 6 led per strip wired in three groups of 24 (led driver board has three anode and three cathode pins)
                  link to datasheet: https://datasheetspdf.com/pdf-file/8.../T650HVN05.4/1

                  Vizio 56.04219.641G (liteon PA-3231-01WN-LF) Power Supply Unit
                  https://www.shopjimmy.com/vizio-56-0...-power-supply/

                  Vizio 55.75J01.001G (91.75J10.004G) Main Board...
                  08-20-2020, 03:57 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
                • bstewara
                  Vizio P659-G1 Screen Removal / Backlight Replacement
                  by bstewara
                  Hi All,
                  Has anyone had the experience of replacing backights on the “P” series Vizio tv?
                  Model number P659-G1
                  This type tv has a very small bezel holding the screen in and I’m not sure how the bezel/screen is assembled. ( I’m hoping the screen is not epoxied to the frame)
                  Before I attempt this I thought maybe someone on this forum has performed this backlight replacement procedure.

                  Thanks in advance...
                  09-26-2022, 10:40 AM
                • double_DD
                  Transformer replacement for a dead coffee machine
                  by double_DD
                  Hi guys,

                  I have a dead coffee machine, and it seems that the culprit (no 1, at least) is a dead trafo - primary coil seems to be blown open (type shown on the picture below).

                  Now, I'm unable to find direct replacement anywhere on ebay or aliexpress, and all similar that I' was able to find are rated too low (<1A).

                  If someone knows a shop to buy replacement (EU/CH), that would of course be my 1st option.
                  My other ideas:
                  - to buy 220/20Vac trafo with 30VA, and to "manually" create secondary 12V output just via resistor
                  - to buy...
                  06-23-2025, 05:43 AM
                • Yanleb
                  Vizio M70-D3 4K with dark spots backlight issue
                  by Yanleb
                  I have a Vizio M70-D3 4K with a dark spots backlight issue. It is using the Y8387248A backlight driver board.

                  On this model each of the 64 transistor powers 2 LEDs. Using my TKDMR TD3H backlight tester I've determined that the backlight LED strips were the issue, and the backlight driver board was just fine. Some LED pairs required 5.9 volt at 155mA, some required 9.5 volt and some were completely open.

                  I've removed the LCD panel and once the LED strips were exposed I've tested them again by connecting my LED tester directly on the test pads. To my surprise all, I've...
                  03-22-2022, 01:06 AM
                • Loading...
                • No more items.
                Working...