Vizio E321VL - backlights but no OSD

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  • ahickman
    Badcaps Veteran
    • Jan 2012
    • 233
    • USA

    #1

    Vizio E321VL - backlights but no OSD

    Just got a Visio E321VL from the trash. It turns on/off but no picture. Backlights are lit (blue screen). Suggestions on where to start? T-Con failure?
  • tom66
    EVs Rule
    • Apr 2011
    • 32560
    • UK

    #2
    Re: Vizio E321VL - backlights but no OSD

    No video, no OSD, check t-con fuse.
    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

    • ahickman
      Badcaps Veteran
      • Jan 2012
      • 233
      • USA

      #3
      Re: Vizio E321VL - backlights but no OSD

      Having a difficult time identifying the fuse. I see an F101 and F102 but don't see either component.
      Attached Files

      Comment

      • tom66
        EVs Rule
        • Apr 2011
        • 32560
        • UK

        #4
        Re: Vizio E321VL - backlights but no OSD

        That little green device next to F101 may be the alternate placement for the fuse (different part but same number.)
        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

        • ahickman
          Badcaps Veteran
          • Jan 2012
          • 233
          • USA

          #5
          Re: Vizio E321VL - backlights but no OSD

          140 ohms in one direction and 50 ohms in reverse direction. Doesn't make sense. I am using a DVM and not analog meter.

          Comment

          • tom66
            EVs Rule
            • Apr 2011
            • 32560
            • UK

            #6
            Re: Vizio E321VL - backlights but no OSD

            Hmm, what is the marking (usually a letter) on it and is it green colour?
            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

            • ahickman
              Badcaps Veteran
              • Jan 2012
              • 233
              • USA

              #7
              Re: Vizio E321VL - backlights but no OSD

              "0"

              Comment

              • tom66
                EVs Rule
                • Apr 2011
                • 32560
                • UK

                #8
                Re: Vizio E321VL - backlights but no OSD

                Green?
                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

                • ahickman
                  Badcaps Veteran
                  • Jan 2012
                  • 233
                  • USA

                  #9
                  Re: Vizio E321VL - backlights but no OSD

                  I tested again, placing my probes atop the metallic ends and got 0 ohms in forward/reverse direction. Turned on TV set and measured DCV at either end. Both ends show 0 VDC.

                  Comment

                  • ahickman
                    Badcaps Veteran
                    • Jan 2012
                    • 233
                    • USA

                    #10
                    Re: Vizio E321VL - backlights but no OSD

                    Yes, the SMD is green with white "0" in center.

                    Comment

                    • tom66
                      EVs Rule
                      • Apr 2011
                      • 32560
                      • UK

                      #11
                      Re: Vizio E321VL - backlights but no OSD

                      Can you test voltage across the large brown ceramic capacitor C110? I am expecting 12V.
                      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

                      • ahickman
                        Badcaps Veteran
                        • Jan 2012
                        • 233
                        • USA

                        #12
                        Re: Vizio E321VL - backlights but no OSD

                        0 vdc

                        Comment

                        • ahickman
                          Badcaps Veteran
                          • Jan 2012
                          • 233
                          • USA

                          #13
                          Re: Vizio E321VL - backlights but no OSD

                          Snap shot of main board?
                          Attached Files

                          Comment

                          • tom66
                            EVs Rule
                            • Apr 2011
                            • 32560
                            • UK

                            #14
                            Re: Vizio E321VL - backlights but no OSD

                            Both fuses on main board good? 12V and 5V?
                            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

                            • ahickman
                              Badcaps Veteran
                              • Jan 2012
                              • 233
                              • USA

                              #15
                              Re: Vizio E321VL - backlights but no OSD

                              Yes.

                              Comment

                              • tom66
                                EVs Rule
                                • Apr 2011
                                • 32560
                                • UK

                                #16
                                Re: Vizio E321VL - backlights but no OSD

                                Do you have 5V and 12V at both ends of each fuse?
                                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

                                • ahickman
                                  Badcaps Veteran
                                  • Jan 2012
                                  • 233
                                  • USA

                                  #17
                                  Re: Vizio E321VL - backlights but no OSD

                                  12.85 VDC and 5.31 VDC on both ends.

                                  Comment

                                  • tom66
                                    EVs Rule
                                    • Apr 2011
                                    • 32560
                                    • UK

                                    #18
                                    Re: Vizio E321VL - backlights but no OSD

                                    Can I get a shot of the other side of the LVDS connector on main board. May help to remove it. Trying to see traces leading to it.
                                    I got to go to bed for 9am 2hr maths lecture in 30 mins.
                                    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

                                    • ahickman
                                      Badcaps Veteran
                                      • Jan 2012
                                      • 233
                                      • USA

                                      #19
                                      Re: Vizio E321VL - backlights but no OSD

                                      Hard to get it all in.
                                      Attached Files

                                      Comment

                                      • tom66
                                        EVs Rule
                                        • Apr 2011
                                        • 32560
                                        • UK

                                        #20
                                        Re: Vizio E321VL - backlights but no OSD

                                        Sorry, miscommunication. I meant the other side of the connector, not the bottom. To the side where all the other components aren't there.

                                        But that may prove useful later.
                                        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

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