Vizio 37" having intermittent issues

Collapse
X
 
  • Time
  • Show
Clear All
new posts
  • Pentium4
    CapXon Be Gone
    • Sep 2011
    • 3741
    • USA

    #1

    Vizio 37" having intermittent issues

    So I got this thing broken. When I go to test it, it will turn on and function as a completely normal TV. When I hit the power button when it's cold, it will turn back on when I hit the power button. It will not after being turned on for a long time. And it will run for as long as you want until you turn it off. I brought it to my apartment to temporarily use and now it won't even turn on...All the caps look good on both the main board and the power board although not a fan of the cap choice. Is it probably the voltage regulators on the main board? I'll get my multimeter back tomorrow. In the meantime, is there any ideas to what it could be?
  • tom66
    EVs Rule
    • Apr 2011
    • 32560
    • UK

    #2
    Re: Vizio 37" having intermittent issues

    Sounds like an intermittent regulator though Vizio I know used some crap caps in their 37" PSUs.
    Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
    For service manual, schematic, boardview (board view), datasheet, cad - use our search.

    Comment

    • Pentium4
      CapXon Be Gone
      • Sep 2011
      • 3741
      • USA

      #3
      Re: Vizio 37" having intermittent issues

      Yeah I'll have to check the regulators. The caps on the PSU are Sam Young on the secondary and a NCC on the Primary. Some of the Sam Young's looks like there's pressure in between the vent stamps but not bulging towards the middle, know what I mean?

      Comment

      • ComputerGeek
        Badcaps Veteran
        • Oct 2011
        • 262
        • USA

        #4
        Re: Vizio 37" having intermittent issues

        Originally posted by Pentium4
        So I got this thing broken. When I go to test it, it will turn on and function as a completely normal TV. When I hit the power button when it's cold, it will turn back on when I hit the power button. It will not after being turned on for a long time. And it will run for as long as you want until you turn it off. I brought it to my apartment to temporarily use and now it won't even turn on...All the caps look good on both the main board and the power board although not a fan of the cap choice. Is it probably the voltage regulators on the main board? I'll get my multimeter back tomorrow. In the meantime, is there any ideas to what it could be?
        Whats the model I might have the power board? Not, for free but I'll work with you on the price.

        Comment

        • retiredcaps
          Badcaps Legend
          • Apr 2010
          • 9271

          #5
          Re: Vizio 37" having intermittent issues

          Originally posted by Pentium4
          I brought it to my apartment to temporarily use and now it won't even turn on.
          I prefer these types of problems rather than the intermittment ones. I have an ATX power supply that sometimes works and then dies and sometimes it doesn't power on. I wish it would just do the latter and then I can start troubleshooting it.
          --- begin sig file ---

          If you are new to this forum, we can help a lot more if you please post clear focused pictures (max resolution 2000x2000 and 2MB) of your boards using the manage attachments button so they are hosted here. Information and picture clarity compositions should look like this post.

          We respectfully ask that you make some time and effort to read some of the guides available for basic troubleshooting. After you have read through them, then ask clarification questions or report your findings.

          Please do not post inline and offsite as they slow down the loading of pages.

          --- end sig file ---

          Comment

          • Pentium4
            CapXon Be Gone
            • Sep 2011
            • 3741
            • USA

            #6
            Re: Vizio 37" having intermittent issues

            Okay so I got around to testing this thing. Let me know if there are more I need to test if I missed any. Looks like I have at least 1 bad voltage regulator...Here are the results:

            #1
            Pin 1 = 0.000
            Pin 2 = 1.252
            Pin 3 = 3.326

            #2
            Pin 1 = 2.056
            Pin 2 = 3.306
            Pin 3 = 5.050

            #3
            Pin 1 = 0.000
            Pin 2 = 0.000
            Pin 3 = 0.000

            #4
            Pin 1 = 0.559
            Pin 2 = 1.816
            Pin 3 = 3.333
            Attached Files
            Last edited by Pentium4; 10-24-2012, 09:09 PM.

            Comment

            • retiredcaps
              Badcaps Legend
              • Apr 2010
              • 9271

              #7
              Re: Vizio 37" having intermittent issues

              Originally posted by Pentium4
              #3
              Pin 1 = 0.000
              Pin 2 = 0.000
              Pin 3 = 0.000
              1) What is the part number for #3?

              2) Are there any DC voltages on the caps around the #3 regulator?

              3) Are there any DC voltages on the resistors around that #3 regulator?

              4) Can we get a close up shot of that area?
              --- begin sig file ---

              If you are new to this forum, we can help a lot more if you please post clear focused pictures (max resolution 2000x2000 and 2MB) of your boards using the manage attachments button so they are hosted here. Information and picture clarity compositions should look like this post.

              We respectfully ask that you make some time and effort to read some of the guides available for basic troubleshooting. After you have read through them, then ask clarification questions or report your findings.

              Please do not post inline and offsite as they slow down the loading of pages.

              --- end sig file ---

              Comment

              • Pentium4
                CapXon Be Gone
                • Sep 2011
                • 3741
                • USA

                #8
                Re: Vizio 37" having intermittent issues

                Thanks for the reply! Part # is: EH11A 127F25. Circled is the closest thing that gets DC power (I didn't test the caps though)
                Attached Files
                Last edited by Pentium4; 10-24-2012, 09:43 PM.

                Comment

                • retiredcaps
                  Badcaps Legend
                  • Apr 2010
                  • 9271

                  #9
                  Re: Vizio 37" having intermittent issues

                  What is part number TU1? Post a link to its datasheet as well.
                  --- begin sig file ---

                  If you are new to this forum, we can help a lot more if you please post clear focused pictures (max resolution 2000x2000 and 2MB) of your boards using the manage attachments button so they are hosted here. Information and picture clarity compositions should look like this post.

                  We respectfully ask that you make some time and effort to read some of the guides available for basic troubleshooting. After you have read through them, then ask clarification questions or report your findings.

                  Please do not post inline and offsite as they slow down the loading of pages.

                  --- end sig file ---

                  Comment

                  • retiredcaps
                    Badcaps Legend
                    • Apr 2010
                    • 9271

                    #10
                    Re: Vizio 37" having intermittent issues

                    On pin 3 of TU8 (regulator #3), see what it has continuity to. Namely, does it have continuity to any pins on TU1 or the caps TCE5 and TCE6?
                    --- begin sig file ---

                    If you are new to this forum, we can help a lot more if you please post clear focused pictures (max resolution 2000x2000 and 2MB) of your boards using the manage attachments button so they are hosted here. Information and picture clarity compositions should look like this post.

                    We respectfully ask that you make some time and effort to read some of the guides available for basic troubleshooting. After you have read through them, then ask clarification questions or report your findings.

                    Please do not post inline and offsite as they slow down the loading of pages.

                    --- end sig file ---

                    Comment

                    • Pentium4
                      CapXon Be Gone
                      • Sep 2011
                      • 3741
                      • USA

                      #11
                      Re: Vizio 37" having intermittent issues

                      All 4 of them have the same Part # on them.


                      thank you for your help so far!

                      Pin 3 of #3 has continuity to only cap TCE5
                      Last edited by Pentium4; 10-24-2012, 10:35 PM.

                      Comment

                      • retiredcaps
                        Badcaps Legend
                        • Apr 2010
                        • 9271

                        #12
                        Re: Vizio 37" having intermittent issues

                        I mean the datasheet for TU1 (8 pin IC).
                        --- begin sig file ---

                        If you are new to this forum, we can help a lot more if you please post clear focused pictures (max resolution 2000x2000 and 2MB) of your boards using the manage attachments button so they are hosted here. Information and picture clarity compositions should look like this post.

                        We respectfully ask that you make some time and effort to read some of the guides available for basic troubleshooting. After you have read through them, then ask clarification questions or report your findings.

                        Please do not post inline and offsite as they slow down the loading of pages.

                        --- end sig file ---

                        Comment

                        • Pentium4
                          CapXon Be Gone
                          • Sep 2011
                          • 3741
                          • USA

                          #13
                          Re: Vizio 37" having intermittent issues

                          Ohhh okay. I can't find anything on it. It reads:
                          432N
                          C0J5
                          07

                          Thank you for being patient with me
                          Last edited by Pentium4; 10-24-2012, 10:48 PM.

                          Comment

                          • retiredcaps
                            Badcaps Legend
                            • Apr 2010
                            • 9271

                            #14
                            Re: Vizio 37" having intermittent issues

                            Originally posted by Pentium4
                            Pin 3 of #3 has continuity to only cap TCE5
                            1) See if there is DC voltage across the TCE5 cap.

                            2) See what else is the + leg of TCE5 is connected to.
                            --- begin sig file ---

                            If you are new to this forum, we can help a lot more if you please post clear focused pictures (max resolution 2000x2000 and 2MB) of your boards using the manage attachments button so they are hosted here. Information and picture clarity compositions should look like this post.

                            We respectfully ask that you make some time and effort to read some of the guides available for basic troubleshooting. After you have read through them, then ask clarification questions or report your findings.

                            Please do not post inline and offsite as they slow down the loading of pages.

                            --- end sig file ---

                            Comment

                            • retiredcaps
                              Badcaps Legend
                              • Apr 2010
                              • 9271

                              #15
                              Re: Vizio 37" having intermittent issues

                              Originally posted by Pentium4
                              432N
                              It could be

                              https://cdn.badcaps-static.com/pdfs/...a5f3eed1f1.pdf

                              See if pin 3 (VCC) has any voltage wrt to chassis ground.
                              --- begin sig file ---

                              If you are new to this forum, we can help a lot more if you please post clear focused pictures (max resolution 2000x2000 and 2MB) of your boards using the manage attachments button so they are hosted here. Information and picture clarity compositions should look like this post.

                              We respectfully ask that you make some time and effort to read some of the guides available for basic troubleshooting. After you have read through them, then ask clarification questions or report your findings.

                              Please do not post inline and offsite as they slow down the loading of pages.

                              --- end sig file ---

                              Comment

                              • ComputerGeek
                                Badcaps Veteran
                                • Oct 2011
                                • 262
                                • USA

                                #16
                                Re: Vizio 37" having intermittent issues

                                Whats the model I might have the power board?

                                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
                                • 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
                                • mrtek
                                  Vizio M65-C1
                                  by mrtek
                                  Hi.

                                  picked up another TV. This time is a Vizio M65-C1. TV does not turn on. I had repaired another 60 inch vizio , Bad main board.
                                  When power button is pressed, the Power led indicator on the bottom right, turns for a few seconds and then it fades away. No backlight or Vizio logo on screen. Removed back cover and repeated test.
                                  This is the TV This TV is a little different from the Samsung I have worked on. Power supply is on the Left side, Main Bd is on the right side, T-CON , not in the picture is on the bottom. I am assuming that the boards in the middle are the LED...
                                  Yesterday, 07:28 PM
                                • ChillingCicada
                                  Vizio VO42L Issues: Need Guidance
                                  by ChillingCicada
                                  We've had our Vizio VO42L since before 2010, and it's worked flawlessly this entire time. However, just recently it started emitting a high-pitched buzzing/humming sound. I followed the basic troubleshooting tips of just unplugging it for a moment, and even holding down the power button while doing so, all to no avail.

                                  Furthermore, after I attempted these basic steps and powered the TV back on it would always begin visually flickering while the sound stuttered. After a few moments of being turned on this would go away, but it still periodically comes back.

                                  I also...
                                  06-09-2021, 05:47 PM
                                • xeos
                                  10 year old Vizio VO370M has intermittent flickering backlight
                                  by xeos
                                  I have this Vizio VO370M TV that I'd like to save because it has very low input lag (as good as the most expensive TVs sold today!, https://alantechreview.blogspot.com/...input-lag.html), but it has a very annoying issue: sometimes the backlight flickers (or is just kind of dim). The flicker is slower than 60hz, so we aren't just talking some kind of motion compensation).

                                  I was hoping maybe it was a power board issue (aka failing caps) but I opened it up and I don't see any that look bad. I have a budget capacitance/ESR meter if it's worth checking those...
                                  05-14-2021, 03:39 PM
                                • Loading...
                                • No more items.
                                Working...