Samsung ue19d4003 wont turn on

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  • adamp91gvm
    Badcaps Veteran
    • Jan 2014
    • 699
    • uk

    #1

    Samsung ue19d4003 wont turn on

    Hi guys i have this tv when i unplug the av board the back light comes on and im getting 12.5v going to the av board but when i plug it in i get 13v and the screen goes black
  • adamp91gvm
    Badcaps Veteran
    • Jan 2014
    • 699
    • uk

    #2
    Re: Samsung ue19d4003 wont turn on

    As shown
    Attached Files

    Comment

    • budm
      Badcaps Legend
      • Feb 2010
      • 40746
      • USA

      #3
      Re: Samsung ue19d4003 wont turn on

      Where is the flat ribbon cable between the integrated T-CON on the LCD panel and the Main 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

      • adamp91gvm
        Badcaps Veteran
        • Jan 2014
        • 699
        • uk

        #4
        Re: Samsung ue19d4003 wont turn on

        Taken it out as it makes no difference at the moment

        Comment

        • budm
          Badcaps Legend
          • Feb 2010
          • 40746
          • USA

          #5
          Re: Samsung ue19d4003 wont turn on

          If that cable is removed then there will be no power and signals to run the T-CON board = no pictures on the screen. All you will see is the glowing screen.
          What do you get when that cable is connected? How about the SMD fuse on that T-CON board and the DCV at both ends of the fuse with ref 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

          • adamp91gvm
            Badcaps Veteran
            • Jan 2014
            • 699
            • uk

            #6
            Re: Samsung ue19d4003 wont turn on

            I have tried it with the ribbon in still get the same results only put a white screen when av board is not plugged in from power board

            Comment

            • budm
              Badcaps Legend
              • Feb 2010
              • 40746
              • USA

              #7
              Re: Samsung ue19d4003 wont turn on

              "I have tried it with the ribbon in still get the same results" what does that means? Backligts still on but black screen or backlights are on but gray glowing screen?

              Well, did you check the SMD fuse and the Voltage on the SMD fuse of the T-CON board? Do you also still get backlights when all the cables are back in place?
              Last edited by budm; 07-07-2015, 03:42 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

              • adamp91gvm
                Badcaps Veteran
                • Jan 2014
                • 699
                • uk

                #8
                Re: Samsung ue19d4003 wont turn on

                The back light comes on only if the power board and just the power board is plugged in if the t con and av board are plygged in to its completely black with no back light the back light is plugged into the power board on these

                Comment

                • tom66
                  EVs Rule
                  • Apr 2011
                  • 32560
                  • UK

                  #9
                  Re: Samsung ue19d4003 wont turn on

                  So did you try only AV board connected?
                  Some LCDs go white with no power - others go black. Black is most common. ("Normally Off")
                  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

                  • adamp91gvm
                    Badcaps Veteran
                    • Jan 2014
                    • 699
                    • uk

                    #10
                    Re: Samsung ue19d4003 wont turn on

                    No i have tried it with everything connected and the red light flashes a few times then noting

                    Comment

                    • adamp91gvm
                      Badcaps Veteran
                      • Jan 2014
                      • 699
                      • uk

                      #11
                      Re: Samsung ue19d4003 wont turn on

                      Any ideas

                      Comment

                      • budm
                        Badcaps Legend
                        • Feb 2010
                        • 40746
                        • USA

                        #12
                        Re: Samsung ue19d4003 wont turn on

                        Originally posted by adamp91gvm
                        Any ideas
                        Well, what happen to this? Did you check the T-CON board?
                        https://www.badcaps.net/forum/showpo...93&postcount=7

                        I have no more suggestion since the request is not replied.
                        Last edited by budm; 07-08-2015, 11:43 AM.
                        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

                        • adamp91gvm
                          Badcaps Veteran
                          • Jan 2014
                          • 699
                          • uk

                          #13
                          Re: Samsung ue19d4003 wont turn on

                          There is 5.12 volts going to the t con fuse its like the av board is putting to much power back to the power board and turning it off

                          Comment

                          • budm
                            Badcaps Legend
                            • Feb 2010
                            • 40746
                            • USA

                            #14
                            Re: Samsung ue19d4003 wont turn on

                            Main board does not do any thing to put the power back to the power supply, it sends out on command signals to turn on the power supply board and the inverter circuits. If the mainboard is drawing too much power from the power supply then it can cause the power supply to go into shutdown.
                            So one thing is not really clear to me is that IF there is no cable between the main board and the T-CON board, the TV will turn on and stay on and with glowing screen, but if the cable is connected then the TV will turn off?

                            "There is 5.12 volts going to the t con fuse" 5V is the correct Voltage for running the T-CON board, you get that Voltage on both ends of the fuse, 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

                            • adamp91gvm
                              Badcaps Veteran
                              • Jan 2014
                              • 699
                              • uk

                              #15
                              Re: Samsung ue19d4003 wont turn on

                              Yes its right its like when the av board is unplugged the voltage is correct and the back light comes on but when the av board is plugged in its putting much voltage in and turning off

                              Comment

                              • budm
                                Badcaps Legend
                                • Feb 2010
                                • 40746
                                • USA

                                #16
                                Re: Samsung ue19d4003 wont turn on

                                Originally posted by adamp91gvm
                                Yes its right its like when the av board is unplugged the voltage is correct and the back light comes on but when the av board is plugged in its putting much voltage in and turning off
                                OK, lets make it clear, so you are talking about the cable between the MAIN (AV) board and the power supply board, right? If that is the case, the power supply boar is OK because the power supply board has pull-up resistors to simulate PS-ON and BL-ON signals so when the cable is removed, the power supply will come on, same for the inverter circuit (in this case, it is the LED driver circuit) , but when the main board is connected and there are problems on the main board that causes the main board not to send the PS-ON and the BL-ON to the power supply/LED Driver board combo.
                                So you have problem on the main board if that is the symptom.
                                It is 19" so I reaalu do not know how much money you will be willing to spend to get it repair, also you should read the LCD TV basic troubleshooting guide to understand more about what it takes for the TV to function. Ntes: Your TV uses power supply/LED driver combo board, there is no high Voltage inverter circuit.
                                Last edited by budm; 07-08-2015, 03:01 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

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