finlux 50fme242b-t flashing backlight leds

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  • flocko
    Badcaps Legend
    • Nov 2012
    • 1121
    • uk

    #21
    Re: finlux 50fme242b-t flashing backlight leds

    remove the strip and heat from the rear to remove the LEDs, you can use hot air ( Paint stripper) if you have one, an iron would be Ok as long as it was 60w+ or a hot plate . PM me with the number of LEDs you need + your address and i will send them to you

    Comment

    • Kingblue76
      New Member
      • May 2017
      • 1
      • United Kingdom

      #22
      Re: finlux 50fme242b-t flashing backlight leds

      I have this TV and the back lights problem has occurred one corner of TV is in darkness and can't source replacements anywhere

      Comment

      • crt man
        Senior Member
        • Mar 2013
        • 106
        • England

        #23
        Re: finlux 50fme242b-t flashing backlight leds

        Hi All

        I know this is an old thread, but I have been asked by a work
        colleague to have a look at the above-mentioned set.
        I know it's a backlight issue but the screen is a Vestal VES500UNVL
        I have seen on E-bay these [URL="https://www.ebay.co.uk/itm/FINLUX-50FLHKR242BHC-VES500U"] for a Vestal VES500UNVA.
        Are these likely to work or are they completely different for
        this set and what are the pitfalls with doing one of these thanks

        Alan.
        Last edited by crt man; 07-23-2018, 04:42 AM.

        Comment

        • vinceroger69
          Badcaps Legend
          • Mar 2012
          • 6714
          • uk

          #24
          Re: finlux 50fme242b-t flashing backlight leds

          the ebay link does not work

          Comment

          • crt man
            Senior Member
            • Mar 2013
            • 106
            • England

            #25
            Re: finlux 50fme242b-t flashing backlight leds

            Sorry cannot get link to work will have to copy and paste
            FINLUX-50FLHKR242BHC-VES500UNVA-50INCH-7020PKG-72EA-DRIVE-CHIP-10-PIECE-KIT
            Last edited by crt man; 07-23-2018, 04:59 AM.

            Comment

            • vinceroger69
              Badcaps Legend
              • Mar 2012
              • 6714
              • uk

              #26
              Re: finlux 50fme242b-t flashing backlight leds

              I have used that seller before hes very helpful send him a message through ebay he will confirm if ok for your set i cant help regards too fitting the leds as not done this type yet myself im sure flocko or maybe diif will be able to advise you
              https://www.ebay.co.uk/itm/FINLUX-50...-/332425505049

              Comment

              • crt man
                Senior Member
                • Mar 2013
                • 106
                • England

                #27
                Re: finlux 50fme242b-t flashing backlight leds

                Hi All
                Can someone advise me if the above backlights are repairable
                and what does it entail, there is one led out in the strip but
                there are 22 pairs that are reduced in brightness out of 72.
                There also seems what look like resistors blown off the board
                but not sure on that, any help would be greatly appreciated.


                Alan
                Attached Files

                Comment

                • dick_barton
                  Badcaps Legend
                  • Aug 2015
                  • 6642
                  • Wales

                  #28
                  Re: finlux 50fme242b-t flashing backlight leds

                  Contact Microtech AV Services and see if they can help you identify replacement leds
                  Willing to help but I'm no expert.

                  Comment

                  • crt man
                    Senior Member
                    • Mar 2013
                    • 106
                    • England

                    #29
                    Re: finlux 50fme242b-t flashing backlight leds

                    I have contacted them as they have the parts available,
                    but I do not think I will be able to do this repair,
                    and have asked them if they do a repair service.

                    Alan

                    Comment

                    • crt man
                      Senior Member
                      • Mar 2013
                      • 106
                      • England

                      #30
                      Re: finlux 50fme242b-t flashing backlight leds

                      Originally posted by flocko
                      remove the strip and heat from the rear to remove the LEDs, you can use hot air ( Paint stripper) if you have one, an iron would be Ok as long as it was 60w+ or a hot plate . PM me with the number of LEDs you need + your address and i will send them to you
                      Forgive my ignorance but is it the metal strip you heat,
                      to remove the led's?

                      Alan.

                      Comment

                      • flocko
                        Badcaps Legend
                        • Nov 2012
                        • 1121
                        • uk

                        #31
                        Re: finlux 50fme242b-t flashing backlight leds

                        alloy strip on rear of LEDs, heat until you can remove LEDs without force, replace by dropping the new LEDs on to the pads using a little flux, and heat from the rear ( make sure to have the LEDs the right way round) Good luck Flocko

                        Comment

                        • crt man
                          Senior Member
                          • Mar 2013
                          • 106
                          • England

                          #32
                          Re: finlux 50fme242b-t flashing backlight leds

                          Originally posted by flocko
                          alloy strip on rear of LEDs, heat until you can remove LEDs without force, replace by dropping the new LEDs on to the pads using a little flux, and heat from the rear ( make sure to have the LEDs the right way round) Good luck Flocko
                          There is some that are not at the same brightness as others, do they need replacing as well.

                          Thanks
                          Alan

                          Comment

                          • flocko
                            Badcaps Legend
                            • Nov 2012
                            • 1121
                            • uk

                            #33
                            Re: finlux 50fme242b-t flashing backlight leds

                            There are two LEDs side by side in one case, if only one is working it will show as not being as bright, this is why using 4.5v to test them is useful as they do not burn your eyes out at this voltage, and you can see if only one half of the two are working (although they are working the shorted side will not lite ). If you have a lot of LEDs like these in any of the strings I would replace them as they will fail in time

                            Comment

                            • crt man
                              Senior Member
                              • Mar 2013
                              • 106
                              • England

                              #34
                              Re: finlux 50fme242b-t flashing backlight leds

                              What I mean is there is one case where one LED has failed,
                              there are 22 working with two LED'S but not as bright as the others.

                              hth

                              Comment

                              • vinceroger69
                                Badcaps Legend
                                • Mar 2012
                                • 6714
                                • uk

                                #35
                                Re: finlux 50fme242b-t flashing backlight leds

                                The part where you say looks likes blown resistors on the board is that the area where the leds are less bright?

                                Comment

                                • crt man
                                  Senior Member
                                  • Mar 2013
                                  • 106
                                  • England

                                  #36
                                  Re: finlux 50fme242b-t flashing backlight leds

                                  In the picture P#27 shows one of the area's where these have come from I
                                  am not sure what they are as it does not appear to be a circuit.
                                  There are five of these along the length of the backlight.
                                  The dimmer ones run the whole length of the strip.
                                  Last edited by crt man; 07-30-2018, 05:30 AM. Reason: Addition

                                  Comment

                                  • dick_barton
                                    Badcaps Legend
                                    • Aug 2015
                                    • 6642
                                    • Wales

                                    #37
                                    Re: finlux 50fme242b-t flashing backlight leds

                                    There are five of these along the length of the backlight.
                                    I wonder if they are protection zener diodes.
                                    Willing to help but I'm no expert.

                                    Comment

                                    • crt man
                                      Senior Member
                                      • Mar 2013
                                      • 106
                                      • England

                                      #38
                                      Re: finlux 50fme242b-t flashing backlight leds

                                      Originally posted by dick_barton
                                      I wonder if they are protection zener diodes.
                                      Well when I say there are five, there was five (as they have all come off).

                                      Comment

                                      • flocko
                                        Badcaps Legend
                                        • Nov 2012
                                        • 1121
                                        • uk

                                        #39
                                        Re: finlux 50fme242b-t flashing backlight leds

                                        your problem could be with the four string driver IC (MP3394S), take the time to look at its data and how it works, as for the crispy black parts they were diodes that stop the strings back flowing, but should work without them as the LEDs will do the same job
                                        Last edited by flocko; 07-30-2018, 08:35 AM.

                                        Comment

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