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dynex dx46l150a11 stand by power only

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    dynex dx46l150a11 stand by power only

    let me start by saying hello im jeff and im near birmingham alabama and im a complete noob at this whole tv repair thing. To make a long story short i got a hold of a lg 42" plasma at a local thift store a few weeks ago that ended up needing caps, i had it fixed in an hr and had less than 30 bucks in it. Well needless to say now im hooked and i dont really know crap but i have a decent multimeter and a soldering gun and im willing to listen and learn what i have now is a dynex 46 that does nothing but flash the stand by led there is no reaction when i hit the power button sound or visual not even a click caps and glass fuse look good. Judging from the threads on similar models with the same issue it could be almost anything and troubleshooting it is going to be a challenge. With my strange work schedule it may take me a couple of days to reply sometimes..........Ok guys lets get started, what to look at next !!!!!!!!!!!!

    #2
    Re: dynex dx46l150a11 stand by power only

    pics
    Attached Files

    Comment


      #3
      Re: dynex dx46l150a11 stand by power only

      few more
      Attached Files

      Comment


        #4
        Re: dynex dx46l150a11 stand by power only

        OK, on the power supply board, there are 3 white connectors with labels for the pins.
        Take the DC voltage readings (using chassis as the ground ref. point), when TV is plugged in but the power switch not activated, then with the power switch activated.
        Post all the pins labels follow by the voltage readings.
        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


          #5
          Re: dynex dx46l150a11 stand by power only

          it looks like im getting nothing but on the bottom 5v1 pin im getting 5.1 thats on the top ribbon on the right

          Comment


            #6
            Re: dynex dx46l150a11 stand by power only

            ok fooling around with it some the backlight was flickering some while I was plugging the ribbon in that goes to the main board....... thinking maybe cold solder ?????????

            Comment


              #7
              Re: dynex dx46l150a11 stand by power only

              Originally posted by budm View Post
              OK, on the power supply board, there are 3 white connectors with labels for the pins.
              Take the DC voltage readings (using chassis as the ground ref. point), when TV is plugged in but the power switch not activated, then with the power switch activated.
              Post all the pins labels follow by the voltage readings.
              I am still waiting for the reports of all the readings and the labels on each one of those pins on the connectors.
              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


                #8
                Re: dynex dx46l150a11 stand by power only

                bon .012
                pwm .003
                gnd 0
                gnd 0
                12v 0
                12v 0
                gnd 0
                gnd 0
                32v 0
                5v1 0
                gnd 0
                5v1 0
                gnd 0
                pon 0
                24v 0
                24v 0
                gnd 0
                gnd 0
                gnd 0
                not sure what happened im not even getting th 5.1 volt standby power anymore fuse is good

                Comment


                  #9
                  Re: dynex dx46l150a11 stand by power only

                  You have 3 connectors on the board, what are the reading on the rest. So far I see the inverter board is not getting the BON (Backlights ON), PWM signals from the main board per your readings on post 8.
                  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

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