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Samsung LN-T3242H works fine for a day, then wont turn on. intermittent.

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    Samsung LN-T3242H works fine for a day, then wont turn on. intermittent.

    i got this TV from the recycle place for 20$ and it seemed great at first...used it all day and night the first day, but the next day it wont turn on. then i unplugged it and let it rest for a few minutes, and it did turn back on.... turned it off...tried to turn it back on but it wont.

    when i plug in power the red power LED comes on
    when i push the power button, the power LED blinks 4 times, then makes a crazy chime (sounds like some kind of powerup in an old video game)
    after making the chime the tv either turns on, or stays black.
    the LED does not change from red to white or anything like that.

    in normal operation, the LED turns off and the TV turns on.

    sometimes it does this, but sometimes the LED just keeps blinking a slow blink...i cant tell if its 4 blinks over and over again or just a constant blink. the time between blinks is about 1 second.

    if i press the power again, it "turns off" by making another chime sound.

    i took it apart and didnt notice any blown caps or anything obvious...just some dust. which i cleaned.

    what can cause a tv to work perfectly fine one day and wont even turn on the next?

    im thinking it might be the inverter because i have 24v to the inverter and i have voltages going to the TCON as well... and the image sometimes displays for a second and then the backlight goes out.
    also for some reason when i disconnect the inverter from the power board, it only blinks once or twice and then makes the chime...

    im not really sure what voltages im supposed to be getting to the TCON but i saw some 5v in there for sure
    Attached Files
    Don't fear the repair...

    #2
    Re: Samsung LN-T3242H works fine for a day, then wont turn on. intermittent.

    heres the inverter board
    Attached Files
    Don't fear the repair...

    Comment


      #3
      Re: Samsung LN-T3242H works fine for a day, then wont turn on. intermittent.

      there appear to be 2 seperate connections for the inverter board on the power supply. one is not used but the cable coming from the inverter can easily fit there too. i dont want to just try it though because some of the pins are labeled differently. what is the purpose of this second connector (one is marked A, and the other is marked S)
      Don't fear the repair...

      Comment


        #4
        Re: Samsung LN-T3242H works fine for a day, then wont turn on. intermittent.

        If it comes on and then goes right off sometimes I would suspect maybe a ccfl bulb going bad or maybe a transformer but I think I might lead more towards a bulb. Just my guess.

        Comment


          #5
          Re: Samsung LN-T3242H works fine for a day, then wont turn on. intermittent.

          Mine has the same issue, the second plug does nothing? I have sound still if I unplug the wire to the inverter and plug it back in it will show the picture for around two seconds before going black again??

          Comment


            #6
            Re: Samsung LN-T3242H works fine for a day, then wont turn on. intermittent.

            are you saying you are unplugging and replugging that wire with the TV on?
            Don't fear the repair...

            Comment


              #7
              Re: Samsung LN-T3242H works fine for a day, then wont turn on. intermittent.

              and what exactly are you saying about the second plug? i havent tried to plug into that. the one labeled S. have you tried it?
              Don't fear the repair...

              Comment


                #8
                Re: Samsung LN-T3242H works fine for a day, then wont turn on. intermittent.

                i should test and see if i get sound now that u mention it
                Don't fear the repair...

                Comment


                  #9
                  Re: Samsung LN-T3242H works fine for a day, then wont turn on. intermittent.

                  Are there any label on the inverter board? We need to look for BL_ON pin and see if it is present or not, you do have 24VDC, right?
                  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


                    #10
                    Re: Samsung LN-T3242H works fine for a day, then wont turn on. intermittent.

                    yes using the now standard "n64 with mariokart" audio test, i find that my TV is sending audio just fine...and most likely video as well, but something is keeping the backlight from coming on...
                    Don't fear the repair...

                    Comment


                      #11
                      Re: Samsung LN-T3242H works fine for a day, then wont turn on. intermittent.

                      yes the inverter has 24v at all the capacitors and IC's
                      Don't fear the repair...

                      Comment


                        #12
                        Re: Samsung LN-T3242H works fine for a day, then wont turn on. intermittent.

                        Well, how about the labels on the connector of the inverter board?
                        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


                          #13
                          Re: Samsung LN-T3242H works fine for a day, then wont turn on. intermittent.

                          Yes TV was turned on

                          Comment


                            #14
                            Re: Samsung LN-T3242H works fine for a day, then wont turn on. intermittent.

                            The one labeled s doesn't do anuthing

                            Comment


                              #15
                              Re: Samsung LN-T3242H works fine for a day, then wont turn on. intermittent.

                              I unplug my inverter wire and back in and the picture works for about 2 seconds

                              Comment


                                #16
                                Re: Samsung LN-T3242H works fine for a day, then wont turn on. intermittent.

                                thanks spoksta ill try that and see whats up. budm here are the labels.
                                Attached Files
                                Don't fear the repair...

                                Comment


                                  #17
                                  Re: Samsung LN-T3242H works fine for a day, then wont turn on. intermittent.

                                  Iv got to get In bed 430 comes early, when I get in tomorrow afternoon could someone explain to me what y'all are testing and how I should go about doing this also

                                  Comment


                                    #18
                                    Re: Samsung LN-T3242H works fine for a day, then wont turn on. intermittent.

                                    Label by the connector.
                                    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


                                      #19
                                      Re: Samsung LN-T3242H works fine for a day, then wont turn on. intermittent.

                                      unplugging and replugging the inverter board from the power board does nothing...
                                      Don't fear the repair...

                                      Comment


                                        #20
                                        Re: Samsung LN-T3242H works fine for a day, then wont turn on. intermittent.

                                        You have to do the big set of wires on the side the little ones at the bottom doesn't do anything either

                                        Comment

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