Finlux LED backlight not working

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  • stoian_93
    Member
    • Oct 2022
    • 13
    • Bulgaria
    #1

    Finlux LED backlight not working

    Hello guys!
    My Finlux TV backlight stopped working. I disassembled the TV, saw I don't have the tools to replace the backlight and assembled it again without replacing anything. So then the backlight started working again.
    A day after it is also not working.
    I decided now to remove the back cover and get the output voltage to the backlight. I placed the TV facedown and connected to the mains, so - nothing. I disconected, removed the cover and connected again to the mains and then the backlight lighted again. So strange.
    Output voltage when light is 66V.
    Board: VESTEL 17IPS62
    What could the problem be?
    Last edited by stoian_93; 08-19-2023, 01:51 AM.
    Tags: None
    • yokoono
      Badcaps Veteran
      • Apr 2010
      • 478
      #2
      Re: Finlux LED backlight not working

      Change the LEDs and stop wasting time. 2x 11 leds x 3v = 66V. The voltage is correct.

        Comment

        • stoian_93
          Member
          • Oct 2022
          • 13
          • Bulgaria
          #3
          Re: Finlux LED backlight not working

          Originally posted by yokoono
          Change the LEDs and stop wasting time. 2x 11 leds x 3v = 66V. The voltage is correct.
          They were already changed 2 times untill now.

            Comment

            • zwarder
              Member
              • Oct 2013
              • 45
              • United Kingdom
              #4
              Re: Finlux LED backlight not working

              Buy new led strips from aliexpress with the sreen number usually VES******

                Comment

                • stoian_93
                  Member
                  • Oct 2022
                  • 13
                  • Bulgaria
                  #5
                  Re: Finlux LED backlight not working

                  Guys, the LED stops lighting, and after some time starts again.
                  Last time I opened the TV again, pluged into the mains, the LED did NOT lighted and I measured 24V, going to it.
                  I can not find out which element on the board is the problem.

                    Comment

                    • nomoresonys
                      Badcaps Legend
                      • Jan 2013
                      • 12093
                      • U.S.
                      #6
                      Re: Finlux LED backlight not working

                      Wonder if it's a bad led driver ic on the powerboard or something, make sure it's not just a bad solder joint, see if you can get a clue from that page: https://www.google.com/search?client...ps62+schematic

                        Comment

                        • stoian_93
                          Member
                          • Oct 2022
                          • 13
                          • Bulgaria
                          #7
                          Re: Finlux LED backlight not working

                          Originally posted by nomoresonys
                          Wonder if it's a bad led driver ic on the powerboard or something, make sure it's not just a bad solder joint, see if you can get a clue from that page: https://www.google.com/search?client...ps62+schematic
                          I'm sure it's not a bad joint. I saw some of them and made them again, so it's not. I ordered new driver and when replace it will see if it is. But there's nothing else, that seems to be defective. Thank you 'till now!

                            Comment

                            • SMDFlea
                              Super Moderator
                              • Jan 2018
                              • 20534
                              • UK
                              #8
                              Re: Finlux LED backlight not working

                              Put make and model number in thread title ! ! ! https://www.badcaps.net/forum/showthread.php?t=24661

                              .
                              All donations to badcaps are welcome, click on this link to donate. Thanks to all supporters

                                Comment

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