Vizio e470vl orange light only

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  • 1beertap
    Badcaps Veteran
    • Mar 2009
    • 219
    • USA
    #1

    Vizio e470vl orange light only

    Hey Folks,
    I have a Vizio e470vl with an orange light only on the front. There is no picture or sound. The power supply seems to be good on the outputs but not the inputs coming from the mainboard. My feeling is that the eeprom has quit and needs to be replaced. Any ideas where the eeprom is located on the mainboard? I don't have a schematic or a pic of the bottom of the mainboard, but I think the chip is located at U14.

    Also, I have checked the power supply on the following pins:

    5v = 5.17v
    5v = 5.17v
    5v = 5.17v
    gnd = ok
    gnd = ok
    gnd = ok
    gnd = ok
    12v = 12.27v
    12v = 12.27v
    12v = 12.27v
    PS_ON = 1.17v
    1-ON/OFF = 0v
    LAMP = 0v
    DIM = .76v

    These readings were the same no matter if I pressed the on/off button. Thanks.
    Attached Files
    Tags: None
    • 1beertap
      Badcaps Veteran
      • Mar 2009
      • 219
      • USA
      #2
      Re: Vizio e470vl orange light only

      Sorry about the first images, but here are the correct ones.
      Attached Files

        Comment

        • Dgtech
          E. Technician
          • Apr 2009
          • 1462
          • Steeler
          #3
          Re: Vizio e470vl orange light only

          Did you check the fuses on the mainboard? There are two small fuses near the larger white input connector.
          The strong-minded rise to the challenge of their goals,the weak-minded BECOME HATERS

            Comment

            • 1beertap
              Badcaps Veteran
              • Mar 2009
              • 219
              • USA
              #4
              Re: Vizio e470vl orange light only

              The two fuses tested good. There is a third fuse nearby, it tested good as well.

                Comment

                • retiredcaps
                  Badcaps Legend
                  • Apr 2010
                  • 9271
                  #5
                  Re: Vizio e470vl orange light only

                  Whenever I see the brand Vizio, I suggest people to test the voltage regulators. It only takes 5 minutes or less. Report your findings exactly as shown in my examples.
                  --- 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.

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                    Comment

                    • 1beertap
                      Badcaps Veteran
                      • Mar 2009
                      • 219
                      • USA
                      #6
                      Re: Vizio e470vl orange light only

                      I'm not sure if there are any regulators under the shielding. The voltage regulators were tested as follows:

                      LOC = U8
                      LINE1 = 7805LT
                      LINE2 = RAB003
                      PIN1 = 12.26V
                      PIN2 = 0V
                      PIN3 = 5.03V

                      LOC = U2
                      LINE1 = 1117
                      LINE2 =
                      PIN1 = 2.05V
                      PIN2 = 3.30V
                      PIN3 = 5.14V

                      LOC = U7
                      LINE1 = 1117
                      LINE2 =
                      PIN1 = 2.04V
                      PIN2 = 3.28V
                      PIN3 = 5.12V

                      LOC = U4
                      LINE1 = 1117
                      LINE2 =
                      PIN1 = 0V
                      PIN2 = 1.25V
                      PIN3 = 3.31V

                      LOC = U3
                      LINE1 = L513
                      LINE2 = G1084
                      PIN1 = 2.06V
                      PIN2 = 3.31V
                      PIN3 = 5.12V

                      LOC = U46
                      LINE1 = 1117
                      LINE2 =
                      PIN1 = 2.02V
                      PIN2 = 3.26V
                      PIN3 = 5.12V

                      LOC = TU5
                      LINE1 = M022
                      LINE2 = G1084
                      PIN1 = 0V
                      PIN2 = 0V
                      PIN3 = 0.28V

                        Comment

                        • 1beertap
                          Badcaps Veteran
                          • Mar 2009
                          • 219
                          • USA
                          #7
                          Re: Vizio e470vl orange light only

                          Anyone know where the firmware chip might be located on this board? I am now assuming it's located under the shielding where the processor resides.

                            Comment

                            • Dgtech
                              E. Technician
                              • Apr 2009
                              • 1462
                              • Steeler
                              #8
                              Re: Vizio e470vl orange light only

                              I think at this point it's time to swap out the main board and be done with it.
                              The strong-minded rise to the challenge of their goals,the weak-minded BECOME HATERS

                                Comment

                                • MisterD
                                  Badcaps Veteran
                                  • Oct 2012
                                  • 668
                                  • United States
                                  #9
                                  Re: Vizio e470vl orange light only

                                  http://www.ernestos-electronics.com/...vl-eeprom-fix/

                                    Comment

                                    • hienton2
                                      Senior Member
                                      • Sep 2009
                                      • 183
                                      #10
                                      Re: Vizio e470vl orange light only

                                      eeprom U14

                                      http://www.ebay.com/itm/Vizio-E470VL...item1e7d7bfa49

                                        Comment

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