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    #1

    Samsung LN46B550K1F Quick Blink

    I am beginning to loose my confidence in repairs since I can't get my last 2 TV's working and now here is a third. Samsung LN46B550K1F Plug it in and I get a the start up sound then a split second of backlight This happens 4 times then just nothing. I do hear the solenoid click with every flash of the backlight and I can see the video behind during the flash. I did put a meter on the inverter board and compared readings. (not sure I did that right either) then I thought bad bulb?? so I took apart down to the bulbs and had to take a video and go frame by frame in a video editor to find the flash. (pic attached) So if anybody can "hold my hand" a little it would be appreciated!
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    #2
    Re: Samsung LN46B550K1F Quick Blink

    Check the inverter board for cold solder joints, bad diodes and transformers. In this case you also have to check the PSU as there is HV generated for the inverter board (See those 2 big black transformers?).

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      #3
      Re: Samsung LN46B550K1F Quick Blink

      No bad solder joints and did a compare between transformers and seemed ok. How can I check the big transformers?

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        #4
        Re: Samsung LN46B550K1F Quick Blink

        transformer ring tester

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          #5
          Re: Samsung LN46B550K1F Quick Blink

          Ok, never heard of that. Where can I buy one?

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            #6
            Re: Samsung LN46B550K1F Quick Blink

            Did you check the diodes on the inverter board too?
            For curiosity sake, put your model into SJ and see if they have a "repair kit" usually there is a list of components and location they replace. If there is something on the PSU, I'd be checking those locations.

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              #7
              Re: Samsung LN46B550K1F Quick Blink

              Originally posted by CraigR View Post
              Ok, never heard of that. Where can I buy one?
              On flea-bay I saw some

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                #8
                Re: Samsung LN46B550K1F Quick Blink

                Yes. I see a big repair kit for the PCU but that's it. Still want a tester if you can tell me where to get.

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                  #9
                  Re: Samsung LN46B550K1F Quick Blink

                  Originally posted by CraigR View Post
                  Yes. I see a big repair kit for the PCU but that's it. Still want a tester if you can tell me where to get.
                  apparently that kit also fixes backlight problem. So check the parts that would go into the backlight circuit.

                  Anatek makes for instance a ring tester, just search in fleabay.

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                    #10
                    Re: Samsung LN46B550K1F Quick Blink

                    is this it?? http://www.ebay.com/itm/AnaTek-Blue-...item2a2ea6e1dd

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                      #11
                      Re: Samsung LN46B550K1F Quick Blink

                      Yes, that is one for example. Of course there are others too...

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                        #12
                        Re: Samsung LN46B550K1F Quick Blink

                        Ok, I will order one up Now how do I use it LOL Got a quick tutorial?

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                          #13
                          Re: Samsung LN46B550K1F Quick Blink

                          There should be something coming with it.

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                            #14
                            Re: Samsung LN46B550K1F Quick Blink

                            Replaced the power board and that fixed the problem.

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