Baird T16509DLEDDS 65" UHD TV

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  • Bloopeta
    Badcaps Veteran
    • Jun 2018
    • 526
    • United Kingdom
    #1

    Baird T16509DLEDDS 65" UHD TV

    Friend has asked me to look at a Baird T16509DLEDDS

    When plugged in, red standby light comes on, press power and green light comes on, but get nothing apart from that.
    With back removed, there is a blue LED illuminated on the small network/wifi board (if thats what it is called lol)

    I have tested the voltages coming from power board, and all seem ok, except dont get any readings for the power to the backlights, whether backlights are plugged in or not, is this normal?

    Any suggestions what to try next, or any know issues much appreciated
    Attached Files
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    • lotas
      Badcaps Legend
      • Jan 2016
      • 4459
      • Russia
      #2
      Re: Baird T16509DLEDDS 65" UHD TV

      If all the supply voltages are normal, then the firmware may have crashed, if there is a programmer, then you can merge the contents (Dump) and put it here, I'll take a look and if it's not working, then I'll fix it.
      Attached Files

        Comment

        • Bloopeta
          Badcaps Veteran
          • Jun 2018
          • 526
          • United Kingdom
          #3
          Re: Baird T16509DLEDDS 65" UHD TV

          Originally posted by lotas
          If all the supply voltages are normal, then the firmware may have crashed, if there is a programmer, then you can merge the contents (Dump) and put it here, I'll take a look and if it's not working, then I'll fix it.
          I am unable to do that Im afraid :/

            Comment

            • dskall
              Badcaps Legend
              • Oct 2016
              • 2905
              • usa
              #4
              Re: Baird T16509DLEDDS 65" UHD TV

              So, no picture on screen with flashlight? What is voltage across main capacitor?
              I assume no responsibility for any stupid suggestions I might post.

                Comment

                • Bloopeta
                  Badcaps Veteran
                  • Jun 2018
                  • 526
                  • United Kingdom
                  #5
                  Re: Baird T16509DLEDDS 65" UHD TV

                  Originally posted by dskall
                  So, no picture on screen with flashlight? What is voltage across main capacitor?
                  Yes there is picture with flashlight

                  Main cap voltages are 390v

                  I have a suspicion its the backlights at fault, however I dont really want to pull the screen if I dont have to being a 65", thats why I was asking when testing votages on the PB, should i get voltage where the backlights plug into?

                    Comment

                    • Storyteller12
                      Badcaps Veteran
                      • Jun 2020
                      • 624
                      • USA
                      #6
                      Re: Baird T16509DLEDDS 65" UHD TV

                      If you have a picture when using a flashlight, 99% of the time it’s the backlights that are bad

                        Comment

                        • dskall
                          Badcaps Legend
                          • Oct 2016
                          • 2905
                          • usa
                          #7
                          Re: Baird T16509DLEDDS 65" UHD TV

                          When turning on tv you should get a voltage rise on the led pins.
                          I assume no responsibility for any stupid suggestions I might post.

                            Comment

                            • Bloopeta
                              Badcaps Veteran
                              • Jun 2018
                              • 526
                              • United Kingdom
                              #8
                              Re: Baird T16509DLEDDS 65" UHD TV

                              Originally posted by dskall
                              When turning on tv you should get a voltage rise on the led pins.
                              Cheers m8, I was doing it wrong, I was turning TV on then testing voltage afterwards

                                Comment

                                • Bloopeta
                                  Badcaps Veteran
                                  • Jun 2018
                                  • 526
                                  • United Kingdom
                                  #9
                                  Re: Baird T16509DLEDDS 65" UHD TV

                                  Originally posted by Storyteller12
                                  If you have a picture when using a flashlight, 99% of the time it’s the backlights that are bad
                                  Yeah I know m8, was just throwing me off that I wasnt getting backlight voltage from PB, but I was testing incorrectly

                                    Comment

                                    • Bloopeta
                                      Badcaps Veteran
                                      • Jun 2018
                                      • 526
                                      • United Kingdom
                                      #10
                                      Re: Baird T16509DLEDDS 65" UHD TV

                                      Problem solved, backlight failure, thankyou everyone

                                        Comment

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