Rca l32hd31yx13

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  • dcapper
    Badcaps Veteran
    • Dec 2013
    • 496
    • Canada
    #1

    Rca l32hd31yx13

    Acquired this tv the other day. Why I took it, I have no idea. Anyways I thought it was the main board. Payless Components sent me one and I installed it but removed it right away when I realized it was modded and missing parts. I sent it back. But it did the same thing my mainboard did. I can turn the tv on and off with the remote or panel but I get no pic or no sound. I am getting proper voltage to the inverter and to the mainboard. I still think it could be the mainboard but I don't want to sink any major cash into this thing.

    I just lifted the panel a little to take the pics. I can unhook it all to take better pics if needed.
    Attached Files
    Tags: None
    • stj
      Great Sage 齊天大聖
      • Dec 2009
      • 30977
      • Albion
      #2
      Re: Rca l32hd31yx13

      a much better pic of the board would help.
      i presume the backlight works.

      maybe you are missing he 12v line.
      the amps and panel are usualy 12v

        Comment

        • dcapper
          Badcaps Veteran
          • Dec 2013
          • 496
          • Canada
          #3
          Re: Rca l32hd31yx13

          I'll tear it apart tomorrow. Real dumb setup. Have to disconnect the tcon to open it up.

            Comment

            • stj
              Great Sage 齊天大聖
              • Dec 2009
              • 30977
              • Albion
              #4
              Re: Rca l32hd31yx13

              lol
              i have a UMC (technika/tesco) pos here that has everything on the rear - other than the panel & controls.
              you have to split it about 6inches,
              then put your arm in and unplug the panel, the button-board and the backlights.
              only then can you take the back off fully!!!

                Comment

                • dcapper
                  Badcaps Veteran
                  • Dec 2013
                  • 496
                  • Canada
                  #5
                  Re: Rca l32hd31yx13

                  Here is some pics from the power supply, mainboard, and inverter. I am getting 24v at the inverter.
                  Attached Files

                    Comment

                    • stj
                      Great Sage 齊天大聖
                      • Dec 2009
                      • 30977
                      • Albion
                      #6
                      Re: Rca l32hd31yx13

                      you need to power-up the psu& mainboard & meter the voltages on the connectors between the psu & mainboard to see if your getting 5&12v
                      and then look at the mainboard voltage regulators - see if they all have outputs.

                        Comment

                        • dcapper
                          Badcaps Veteran
                          • Dec 2013
                          • 496
                          • Canada
                          #7
                          Re: Rca l32hd31yx13

                          Metered all my points. All reading voltages. I removed my inverter board and metered where it goes to the panel and there is no voltage or before the steup transformers. I have the 24v coming in but dies somewhere on the board. Getting a short across a diode but I tested it out of circuit and it's fine. Tested all the diodes and transistors so far and no fault found.
                          Last edited by dcapper; 05-19-2014, 11:10 PM.

                            Comment

                            • Agent24
                              I see dead caps
                              • Oct 2007
                              • 4946
                              • New Zealand
                              #8
                              Re: Rca l32hd31yx13

                              Originally posted by dcapper
                              Getting a short across a diode but I tested it out of circuit and it's fine.
                              Check for something shorted in parallel?
                              "Tantalum for the brave, Solid Aluminium for the wise, Wet Electrolytic for the adventurous"
                              -David VanHorn

                                Comment

                                • dcapper
                                  Badcaps Veteran
                                  • Dec 2013
                                  • 496
                                  • Canada
                                  #9
                                  Re: Rca l32hd31yx13

                                  I think cause there is a schottky transistor by it, it might show the short. I'll take a good pic of the area after work.

                                    Comment

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