VIZIO E500i-A0 No Picture With Sound

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  • carpenter183
    Member
    • Jan 2015
    • 15
    • United States

    #1

    VIZIO E500i-A0 No Picture With Sound

    My issue is no picture. When turning on the TV, the screen will show the VIZIO logo on the screen, but will immediately go black. The LED back light seems to die suddenly. I tried the flashlight trick, but no picture is being shown that I could see. I have sound, the led indicator light on the front is working. I took the back off and looked for bulging caps or burn marks, but there are no signs of damaged parts. I have not checked any voltages from the power supply yet, but I intend too when I get time. I believe the LED Driver board is built into the power supply, so could that be the culprit? Any help and advice is welcome. Thanks
  • carpenter183
    Member
    • Jan 2015
    • 15
    • United States

    #2
    Re: VIZIO E500i-A0 No Picture With Sound

    I checked all the voltages on the power supply connector to the main logic board and all were good. I believe the back light LEDs are powered by the power supply (led driver), so could that be the issue?
    Attached Files

    Comment

    • carpenter183
      Member
      • Jan 2015
      • 15
      • United States

      #3
      Re: VIZIO E500i-A0 No Picture With Sound

      Bump. Anybody got some suggestions?

      Comment

      • MagicSmoke
        Badcaps Veteran
        • Feb 2011
        • 275
        • USA

        #4
        Re: VIZIO E500i-A0 No Picture With Sound

        If one or more of the led's failed, then PSU will sense problem and shut down B/light circuit. Or a short in the wiring.

        I'm working on a Westinghouse that has three bad led's on one strip. PSU shuts down B/light circuit but not the other voltages. So it still has sound and pic, just cant see it.

        Edit I've tried the flashlight trick, didn't seem to work for me. Now I use a 250 watt halogen lamp if it's got a picture then I can see it.
        Last edited by MagicSmoke; 02-10-2015, 07:29 PM.

        Comment

        • budm
          Badcaps Legend
          • Feb 2010
          • 40746
          • USA

          #5
          Re: VIZIO E500i-A0 No Picture With Sound

          Check the DC Voltages on the LED+ pins of that 4-pin connector when you first turn on the TV to see if there is any LED drive Voltage on the pins.
          That section of the board looks like it got hot.
          There are two large electrolytics caps (c??4), what are their Voltage ratings? I believe they are the filter caps for the boosted voltage power supply for the LEDs.
          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

          • carpenter183
            Member
            • Jan 2015
            • 15
            • United States

            #6
            Re: VIZIO E500i-A0 No Picture With Sound

            I will get right on it budm. I will post results.

            Comment

            • carpenter183
              Member
              • Jan 2015
              • 15
              • United States

              #7
              Re: VIZIO E500i-A0 No Picture With Sound

              Led1- : 10.5v
              Led1+ : 66.7v
              Led2- : 4.6v
              Led2+ : 66.7

              The led+ readings started much higher like 100+ volts but started to decrease and settle at 66.7v.

              Comment

              • carpenter183
                Member
                • Jan 2015
                • 15
                • United States

                #8
                Re: VIZIO E500i-A0 No Picture With Sound

                The caps are C304 and C404 both 200v 47uf. I noticed the TV seems to shut off after about 10 minutes.

                Comment

                • budm
                  Badcaps Legend
                  • Feb 2010
                  • 40746
                  • USA

                  #9
                  Re: VIZIO E500i-A0 No Picture With Sound

                  That sounds like you have open LEDs that is why the Voltage went up high (no load due to open LED) and then it goes into protection mode.
                  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

                  • carpenter183
                    Member
                    • Jan 2015
                    • 15
                    • United States

                    #10
                    Re: VIZIO E500i-A0 No Picture With Sound

                    Here is a close-up.
                    Attached Files

                    Comment

                    • carpenter183
                      Member
                      • Jan 2015
                      • 15
                      • United States

                      #11
                      Re: VIZIO E500i-A0 No Picture With Sound

                      So, what you are saying is I need to replace the string of LEDs in the panel? Or find the open and repair it? What level of difficulty is this?

                      Comment

                      • budm
                        Badcaps Legend
                        • Feb 2010
                        • 40746
                        • USA

                        #12
                        Re: VIZIO E500i-A0 No Picture With Sound

                        It depends on how the panel is put together, definitely not for beginner.
                        Once you get to the LED assemblies then you will test one by one or you may be able to see the bad one that has sign of over heating.
                        Failed LEDs are very common for these LED backlghts TV, it is so sad that they do want to build something that last any more.
                        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

                        • carpenter183
                          Member
                          • Jan 2015
                          • 15
                          • United States

                          #13
                          Re: VIZIO E500i-A0 No Picture With Sound

                          This TV is only 2 years old. Manufactured in 2013. Sam's club special, but no warranty still valid. I feel duped.

                          Comment

                          • MagicSmoke
                            Badcaps Veteran
                            • Feb 2011
                            • 275
                            • USA

                            #14
                            Re: VIZIO E500i-A0 No Picture With Sound

                            Taking the panel apart and then reassembling it requires a lot of patience, otherwise it will crack.

                            Some like the westinghouse I just fixed use the front bezel to hold the panel to the chassis. If I had not looked and been cautious then the panel would have slid out and cracked. The 39" panel was all I wanted to handle by myself, I would not try a 50" without good help.

                            Some hold in with plastic strips, I'm sure there are a lot of variations.

                            The 2nd main thing is to be careful of the tabs bonded to the panel, any damage or dislocation renders panel inoperative.

                            It can be done, replacing individual led's on the strips is not easy, it is much simpler just to replace the bad strip/s.

                            And it's not just the bargain TV's doing it, some of the high end Samsungs, Vizio's and others have similar problems.

                            It looks like you can try to jumper the PS-on and BL-on to 5v Stby to see if B/light will stay on or still shuts off. If it stays on then might be eeprom related but if it shuts off then led's are bad or similar fault.
                            Last edited by MagicSmoke; 02-20-2015, 08:18 PM.

                            Comment

                            • carpenter183
                              Member
                              • Jan 2015
                              • 15
                              • United States

                              #15
                              Re: VIZIO E500i-A0 No Picture With Sound

                              For some reason, the backlight has quit all together. At first, the backlight would show a picture (the VIZIO emblem) for a quick couple of seconds, then disappear. Now no backlight at all.

                              Comment

                              • zukdj
                                Senior Member
                                • Jun 2012
                                • 104
                                • USA

                                #16
                                Re: VIZIO E500i-A0 No Picture With Sound

                                I have a similar problem on the same model E500i-A0 except my backlights strobe every 2 or so seconds, has anyone seen the strobing issue before? I also get no picture that I can see

                                Comment

                                • zukdj
                                  Senior Member
                                  • Jun 2012
                                  • 104
                                  • USA

                                  #17
                                  Re: VIZIO E500i-A0 No Picture With Sound

                                  bump!!!

                                  Comment

                                  • zukdj
                                    Senior Member
                                    • Jun 2012
                                    • 104
                                    • USA

                                    #18
                                    Re: VIZIO E500i-A0 No Picture With Sound



                                    With my TV plugged in and powered on I get a rolling 120-130volts at both LED+, if I unplug the backlights the voltage doesn't change so I can only assume the backlights are shot, any input? with the backlights plugged in they strobe every 2 seconds or so.

                                    Comment

                                    • dick_barton
                                      Badcaps Legend
                                      • Aug 2015
                                      • 6642
                                      • Wales

                                      #19
                                      Re: VIZIO E500i-A0 No Picture With Sound

                                      Looks like another case of Led failure from what you say.
                                      Willing to help but I'm no expert.

                                      Comment

                                      • zukdj
                                        Senior Member
                                        • Jun 2012
                                        • 104
                                        • USA

                                        #20
                                        Re: VIZIO E500i-A0 No Picture With Sound

                                        I just checked negative (-) and I get minimal rolling power there as well, LED1 - 50-42, and LED2 50-29 rolling, definitely think it needs new LEDS. any idea where I can get the LEDS reasonable for my make and model screen LG LC500DUG-JFR1?

                                        Comment

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