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Samsung LNT3242H 32" LCD TV, no picture but audio works- no component damage

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    #21
    Re: Samsung LNT3242H 32" LCD TV, no picture but audio works- no component damage

    Please make sure your meter is on volts DC and the battery is OK, and see if you get 24V instead of 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.

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      #22
      Re: Samsung LNT3242H 32" LCD TV, no picture but audio works- no component damage

      I dont seem to be getting any power from the psu. Lights kick on for 2 seconds then off. I can only see them come on from a hole in the back of the screen. Not on the front at all.

      Comment


        #23
        Re: Samsung LNT3242H 32" LCD TV, no picture but audio works- no component damage

        New LCD screens make it quite difficult to see the light emission from the screen, especially in a well lit room... technology improves. Seeing the backlight from the rear is good enough for us but if you want to confirm it then turn out all the lights and the glow will be more visible.
        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


          #24
          Re: Samsung LNT3242H 32" LCD TV, no picture but audio works- no component damage

          thats a darfon inverter and one or more of the transformers are bad.
          check acme-sales.net for replacements.$3 ea.

          Comment


            #25
            Re: Samsung LNT3242H 32" LCD TV, no picture but audio works- no component damage

            Is there any way I can test them to know for sure. I am capable of soildering. and using a multi meter. (somewhat). I like to learn though.

            Comment


              #26
              Re: Samsung LNT3242H 32" LCD TV, no picture but audio works- no component damage

              Set your meter to OHMS and put red probe on either 1 or 2 and black probe on 3 or 4. Record your readings. List them something like:

              Trasformer 1
              X.XXX
              X.XXX

              Transformer 2
              X.XXX
              X.XXX

              I'm betting kc8adu is spot on since darfon transformers are known for failure.
              Attached Files

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                #27
                Re: Samsung LNT3242H 32" LCD TV, no picture but audio works- no component damage

                1 & 3... OL
                2 & 4... 00.0

                all three of them have this same reaing. Also when I put my meter on the fuse by the cable coming into to the inverter it reads .000. I can post pics if nessesary.

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                  #28
                  Re: Samsung LNT3242H 32" LCD TV, no picture but audio works- no component damage

                  Try measuring across 1-3 and 2-4 instead. Your meter should on 20kohms, if it is manually ranging.
                  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


                    #29
                    Re: Samsung LNT3242H 32" LCD TV, no picture but audio works- no component damage

                    I was asking about these earlier.
                    Attached Files

                    Comment


                      #30
                      Re: Samsung LNT3242H 32" LCD TV, no picture but audio works- no component damage

                      Those are optocouplers, if the PSU is working, then they are fine.
                      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


                        #31
                        Re: Samsung LNT3242H 32" LCD TV, no picture but audio works- no component damage

                        I dont think the power supply is working properly. How can I check it?

                        Comment


                          #32
                          Re: Samsung LNT3242H 32" LCD TV, no picture but audio works- no component damage

                          Have you tested the power supply outputs e.g 5V, 13V, 24V, are they good?
                          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


                            #33
                            Re: Samsung LNT3242H 32" LCD TV, no picture but audio works- no component damage

                            Transformer windings are pin 1 and 2, and 3 and 4. You may have to clean off the flux on the pins to get good contacts.
                            http://s807.photobucket.com/albums/y...t=DSC00191.jpg

                            http://s807.photobucket.com/albums/y...t=4002P710.jpg
                            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


                              #34
                              Re: Samsung LNT3242H 32" LCD TV, no picture but audio works- no component damage

                              ok I get no readings when testing the 24v pins or the 5v pins. meter just keeps cycling through numbers. Is the light bulb method a "must"? But the standby light is lit on the front. Tv does turn on and make start up music.
                              Last edited by landen_michael77; 01-23-2013, 12:30 PM.

                              Comment


                                #35
                                Re: Samsung LNT3242H 32" LCD TV, no picture but audio works- no component damage

                                Originally posted by landen_michael77 View Post
                                I dont seem to be getting any power from the psu. Lights kick on for 2 seconds then off. I can only see them come on from a hole in the back of the screen. Not on the front at all.
                                So now you are saying that you do not see he backligts at the back side of the LCD panel any more? You were seeing it before which means the 24V and the 5V must have been present before, and now they all dead?
                                What is the power supply board P/N ? Is it the saem as the orignal OP, BN44-00156A?
                                Last edited by budm; 01-23-2013, 12:49 PM.
                                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


                                  #36
                                  Re: Samsung LNT3242H 32" LCD TV, no picture but audio works- no component damage

                                  The lights come on for only for 2 seconds. when i put my red on the 24v pin, and my black on one of the ground pins on the power supply I get nothing.....unless I am doing it wrong

                                  Comment


                                    #37
                                    Re: Samsung LNT3242H 32" LCD TV, no picture but audio works- no component damage

                                    Can you show me the pciture? Try using the chassis for the ground instead. Is the board mounted on to the chassis?
                                    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


                                      #38
                                      Re: Samsung LNT3242H 32" LCD TV, no picture but audio works- no component damage

                                      o
                                      Last edited by landen_michael77; 01-23-2013, 01:23 PM.

                                      Comment


                                        #39
                                        Re: Samsung LNT3242H 32" LCD TV, no picture but audio works- no component damage

                                        1
                                        Last edited by landen_michael77; 01-23-2013, 01:14 PM.

                                        Comment


                                          #40
                                          Re: Samsung LNT3242H 32" LCD TV, no picture but audio works- no component damage

                                          When you say "meter just bouncing around" tell us what that means, how (un)stable is it?
                                          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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