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    #1

    Samsung LN46D550K1FXZA No Image

    I have sound and backlights but no image so I replaced the t-con board from ShopJimmy but the problem is the same. All voltages are checking out good, 13v,5v and 3.3v are there and the 12 volts on the t-con board is there. I have heard Samsung had some bad panels but I can't imagine it just stops working. When I power the tv on the red power light will flash 5 times then I can see a flash in the lower right of the screen, backlights will come on and sound will come on but no images. Unfortunately I do not have the remote for this tv.
    Attached Files
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    #2
    Re: Samsung LN46D550K1FXZA No Image

    What happen if you have the ribbon cables between the LCD panel and the T-CON board connected one at a time?
    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

      #3
      Re: Samsung LN46D550K1FXZA No Image

      No change at all

      Comment

        #4
        Re: Samsung LN46D550K1FXZA No Image

        Nest thing to do is to verify if the main board is sending the signals through the LVDS cables to the T-CON or not but you will need the scope to do that.
        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: Samsung LN46D550K1FXZA No Image

          Budm, i replaced the main board as well with one from shopjimmy and no change.

          Comment

            #6
            Re: Samsung LN46D550K1FXZA No Image

            Maybe i should test the cable itself.

            Comment

              #7
              Re: Samsung LN46D550K1FXZA No Image

              On the P_DIM I get 2.05v , is that sufficient voltage?

              Comment

                #8
                Re: Samsung LN46D550K1FXZA No Image

                Originally posted by eagle00799 View Post
                On the P_DIM I get 2.05v , is that sufficient voltage?
                go down to the LCD and there are DUMY left and right side they are Fuse, check them and post here

                Comment

                  #9
                  Re: Samsung LN46D550K1FXZA No Image

                  I don't see any fuse on those boards,
                  Attached Files

                  Comment

                    #10
                    Re: Samsung LN46D550K1FXZA No Image

                    Originally posted by eagle00799 View Post
                    On the P_DIM I get 2.05v , is that sufficient voltage?
                    That is the Backlights dimming control signal.
                    I doubt that you will find SMD fuses of those tab bonding boards, it is not one of those LCD panel with integrated T-CON panel type.
                    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

                      #11
                      Re: Samsung LN46D550K1FXZA No Image

                      Originally posted by eagle00799 View Post
                      I don't see any fuse on those boards,
                      picture 1 on the top right over the hole !!! ist DUMMY?
                      Last edited by Diah; 03-03-2016, 01:49 AM.

                      Comment

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