Vizio P65-E1 No Activities - Voltages oK

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  • jason123
    Badcaps Legend
    • Oct 2015
    • 1051
    • USA
    #1

    Vizio P65-E1 No Activities - Voltages oK

    Hello guys,
    I'm thinking it's bad main board, but I'd love any thoughts or things to try - the board is a couple hundred $$$ and I'd like to be sure before replacing.

    So I got this TV dead - no standby LED or screen activity or backlight.

    Voltages to main board are on (not sure what the level should be, but here is the connector's (PS CN9102) voltages:
    PS_ON: 4.91V
    +VA = 18.79 V
    +VM = 18.82 V

    I spot check voltages on the LED Controller board, and all the large upper inductors have about 9.4V on one or the other side.

    On the main board, I see a whole bunch of rails, 1.1V, 1.2V, 1.5V, 3.3 V, 5V,...

    The main board gets warm (not hot)

    Disconnecting ribbons from TCON to MAIN have no impact.

    Usually when I see many eBay postings for repairs with 3 month warranty, I think of BGA reflow.. wonder if this is the case?


    Anything you'd try at this point? Any experience with common failures on this model?

    Thanks
    Attached Files
    Last edited by jason123; 10-21-2023, 03:20 PM.
    Tags: None
    • EazyBone
      Badcaps Legend
      • Jun 2023
      • 1306
      • United states
      #2
      Re: Vizio P65-E1 No Activities - Voltages oK

      What is the voltages to the Tcon? You get 12v at fuse? 18v to main board sounds about right. I personally have had this same issue with different Vizio. My experience has no voltage going to tcon. I'd do some more testing before sending out. My fix was reflow the chip also, well I just took a hot air gun to it and very lightly pressed it with some tweezers. Give us the tcon readings when get a chance.

      https://www.badcaps.net/forum/showth...&highlight=P65

      This will probably help
      Last edited by EazyBone; 10-21-2023, 07:13 PM.

        Comment

        • jason123
          Badcaps Legend
          • Oct 2015
          • 1051
          • USA
          #3
          Re: Vizio P65-E1 No Activities - Voltages oK

          You're correct, Tcon is not getting any power. Which of the 2 BGAs did you reflow? I have access to a pro BGA rework station. I can get that done tomorrow. Thanks

            Comment

            • EazyBone
              Badcaps Legend
              • Jun 2023
              • 1306
              • United states
              #4
              Re: Vizio P65-E1 No Activities - Voltages oK

              I did both of them. I saw a video of some dude, I think Nick's tvs, said it's usually the "left one" and then said he just does them both to be professional. So if you have access to that machine lol I'd do them both. But, maybe someone with more experience has an answer.

                Comment

                • jason123
                  Badcaps Legend
                  • Oct 2015
                  • 1051
                  • USA
                  #5
                  Re: Vizio P65-E1 No Activities - Voltages oK

                  Extra 6 minutes to do both... i will go with that. Thank you!

                    Comment

                    • EazyBone
                      Badcaps Legend
                      • Jun 2023
                      • 1306
                      • United states
                      #6
                      Re: Vizio P65-E1 No Activities - Voltages oK

                      Yup bring us the results.

                        Comment

                        • jason123
                          Badcaps Legend
                          • Oct 2015
                          • 1051
                          • USA
                          #7
                          Re: Vizio P65-E1 No Activities - Voltages oK

                          TV is up and running again. Fresh thermal paste, full clean.

                          Hope this is helpful to someone - Thank you
                          Attached Files

                            Comment

                            • EazyBone
                              Badcaps Legend
                              • Jun 2023
                              • 1306
                              • United states
                              #8
                              Re: Vizio P65-E1 No Activities - Voltages oK

                              Figured it was that. Good deal thx for update

                                Comment

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