Samsung UE/UN55ES6xxx - black screen with backlight on.

Collapse
X
 
  • Time
  • Show
Clear All
new posts
  • dskall
    Badcaps Legend
    • Oct 2016
    • 2905
    • usa

    #21
    Re: Samsung UE/UN55ES6xxx - black screen with backlight on.

    Remove the other two caps and check
    I assume no responsibility for any stupid suggestions I might post.

    Comment

    • mirokulaz
      Member
      • Apr 2017
      • 14
      • Germany

      #22
      Re: Samsung UE/UN55ES6xxx - black screen with backlight on.

      Originally posted by dskall
      Remove the other two caps and check
      It is not just the two others. I will have to remove almost all caps.

      Comment

      • dskall
        Badcaps Legend
        • Oct 2016
        • 2905
        • usa

        #23
        Re: Samsung UE/UN55ES6xxx - black screen with backlight on.

        Well this thread had same problem now repaired. https://www.badcaps.net/forum/showth...057#post743057
        I assume no responsibility for any stupid suggestions I might post.

        Comment

        • chrle
          Senior Member
          • Sep 2013
          • 158
          • slovakia

          #24
          Re: Samsung UE/UN55ES6xxx - black screen with backlight on.

          try to disconnect one of two cables going from t-con to driver board,and power on tv

          Comment

          • croupier36
            Member
            • May 2023
            • 20
            • SI

            #25
            Re: Samsung UE/UN55ES6xxx - black screen with backlight on.

            Hi....sorry to steal the tread....but just got a Samsung UE55ES6100 that works OK...apart the top half of the screen which is dark....

            I guess this is an issue with the backlight...anyone familiar with this model? Do I have to open the panel completely to reach the backlights for testing or are there other ways to make sure/test that the issue is actually there?

            BTW....in this models the backlights are LEDs or?

            Thanks!

            Comment

            • Diah
              Badcaps Legend
              • Feb 2013
              • 6355
              • Germany

              #26
              Re: Samsung UE/UN55ES6xxx - black screen with backlight on.

              Originally posted by croupier36
              I guess this is an issue with the backligh
              if you upload photo of yours TV screen to show the darkness we can tell you if it BL issue.

              Comment

              • croupier36
                Member
                • May 2023
                • 20
                • SI

                #27
                Re: Samsung UE/UN55ES6xxx - black screen with backlight on.

                Adding some photos of the screen....hope it is clearly visible...
                Attached Files

                Comment

                • Diah
                  Badcaps Legend
                  • Feb 2013
                  • 6355
                  • Germany

                  #28
                  Re: Samsung UE/UN55ES6xxx - black screen with backlight on.

                  Originally posted by croupier36
                  Adding some photos of the screen....hope it is clearly visible...
                  you need to open the cover of the TV and measure with yours DMM with reference to TV chassis the LED+ pins on BL socket at PSU... you have complete raw turn off it could be the inverter ... so need measurements before you do any things ells

                  Comment

                  • croupier36
                    Member
                    • May 2023
                    • 20
                    • SI

                    #29
                    Re: Samsung UE/UN55ES6xxx - black screen with backlight on.

                    OK...have taken the measurements....there are 2 connectors (have added the photos below) and the wired pins are marked R+/- and L +/- from 1-4....have put in the range for the pins where the voltage is not constant....fluctuates during the measurement...

                    R1+: 340-365V
                    R1-: 295-320V
                    R2+: 295-320V
                    R2-: 250-275V
                    R3+: 240V
                    R3-: 200V
                    R4+: 200V
                    R4-: 150V

                    L1+: 205-230V
                    L1-: 0V
                    L2+: 250-275V
                    L2-: 205-230V
                    L3+: 105V
                    L3-: 60V
                    L4+: 150V
                    L4-: 105V

                    Hope it is clear enough....
                    Attached Files

                    Comment

                    • Diah
                      Badcaps Legend
                      • Feb 2013
                      • 6355
                      • Germany

                      #30
                      Re: Samsung UE/UN55ES6xxx - black screen with backlight on.

                      Originally posted by croupier36
                      OK...have taken the measurements.....
                      such measurements have many error.. this cant be.
                      do it in this way... yours DMM on VDC 250V and measure each group alone like R1+ with R!- R2+ with R2- and so on too for L side. always the + & - for same number.

                      Comment

                      • lotas
                        Badcaps Legend
                        • Jan 2016
                        • 4537
                        • Russia

                        #31
                        Re: Samsung UE/UN55ES6xxx - black screen with backlight on.

                        Originally posted by Diah
                        you need to open the cover of the TV and measure with yours DMM with reference to TV chassis the LED+ pins on BL socket at PSU... you have complete raw turn off it could be the inverter ... so need measurements before you do any things ells
                        It came out such indications regarding the common land, so no one measures.

                        Comment

                        • croupier36
                          Member
                          • May 2023
                          • 20
                          • SI

                          #32
                          Re: Samsung UE/UN55ES6xxx - black screen with backlight on.

                          OK....did the measurements for individual pairs:

                          R1: 20-25V
                          R2: 21-26V
                          R3: 40.7V
                          R4: 39.6V

                          L1: 6-11V
                          L2: 22-26V
                          L3: 24.5V
                          L4: 36.3V

                          The above given measurements in a range are as they were fluctuating during the measurement.

                          Comment

                          • Diah
                            Badcaps Legend
                            • Feb 2013
                            • 6355
                            • Germany

                            #33
                            Re: Samsung UE/UN55ES6xxx - black screen with backlight on.

                            Originally posted by croupier36
                            OK....did the measurements for individual pairs:

                            R1: 20-25V
                            R2: 21-26V
                            R3: 40.7V
                            R4: 39.6V

                            L1: 6-11V
                            L2: 22-26V
                            L3: 24.5V
                            L4: 36.3V

                            The above given measurements in a range are as they were fluctuating during the measurement.
                            disconnect the socket between power boards and main boards then plug the tv in wall socket .. repeat yours last measurements way.
                            if there are no much different from last reading... post clear focused photo on yours power boards from top and down side.

                            Comment

                            • croupier36
                              Member
                              • May 2023
                              • 20
                              • SI

                              #34
                              Re: Samsung UE/UN55ES6xxx - black screen with backlight on.

                              Pairs with 1 and 2 have still fluctating voltages...

                              Pairs 3 and 4 are now all at 60 V each.

                              Photos of the PSU attached.
                              Attached Files

                              Comment

                              • Diah
                                Badcaps Legend
                                • Feb 2013
                                • 6355
                                • Germany

                                #35
                                Re: Samsung UE/UN55ES6xxx - black screen with backlight on.

                                ok. so yours BL are just 2 channel each L1,L2 R1,R2 , this is had shorted LED, the other channel L3,L4,R3,R4 are fine read 60V.
                                you need take out the panel and all filter sheet to have access to the LED BL. also you need to replace all at once to have clean repair.
                                Attached Files

                                Comment

                                • croupier36
                                  Member
                                  • May 2023
                                  • 20
                                  • SI

                                  #36
                                  Re: Samsung UE/UN55ES6xxx - black screen with backlight on.

                                  OK, thanks!

                                  Will try to open the pannel in the next days....

                                  Comment

                                  • croupier36
                                    Member
                                    • May 2023
                                    • 20
                                    • SI

                                    #37
                                    Re: Samsung UE/UN55ES6xxx - black screen with backlight on.

                                    So, if I understood correctly....I have to replace only the 2 LED stripes for the BL?
                                    No need to check/replace anything on the PSU board?

                                    Comment

                                    Related Topics

                                    Collapse

                                    • HTR-Informatique
                                      Dell G3 15 3500 - Battery bug (black screen and flashing keyboard backlight)
                                      by HTR-Informatique
                                      Hello,

                                      YouTube video of the problem encountered: https://youtube.com/shorts/q7TLNv36LUo

                                      I am a pro and I have a problem that I have never seen despite my 7.5 years of experience on my own and my thousands of repairs, on a customer's Dell G3 15 3500.

                                      On this PC I have already changed the complete palmrest because the keyboard was no longer working properly.

                                      I also changed the screen because the PC fell and the screen was broken.

                                      I changed the battery with a new and original battery.

                                      I also had corrosion/oxidation on the...
                                      02-09-2025, 06:51 AM
                                    • totof
                                      Samsung UE50KU6070 black screen
                                      by totof
                                      Hello,
                                      I have my TV model UE50KU6070 which I am trying to repair.
                                      BN41-02528A / BN94-10800C motherboard.
                                      If I disconnect the motherboard from the power board, the backlight works. When the motherboard is connected the backlight works but the screen remains black.
                                      When I plug the TV into the electrical outlet, the standby LED lights up but no reaction to an attempt to start it with the remote control for about 1 minute. During this minute the TV consumes about 20W.
                                      After one minute the consumption drops to 0W and the TV can turn on with the remote control but...
                                      09-26-2022, 02:34 PM
                                    • VcemPzd
                                      Black screen Lenovo legion 5 pro 16ACH6H gaming laptop
                                      by VcemPzd
                                      Hello everyone !

                                      My name is Chris, I am a 30 years old embedded software developer working in the automotive industry. I am really passionate about learning new skills and repairing/crafting stuff. I came around this forum last week with the goal of repairing my faulty gaming laptop, indeed, I was video editing on it when suddenly a black screen popped and never disappeared I bought some stuff to try to repair it and learn as many things as possible about computer repairs but nothing worked so far. When the black screen appeared, my legion 5 pro was connected to my external monitor...
                                      04-28-2025, 10:14 AM
                                    • x_orange90_x
                                      TCL 50S535 bad tcon or panel issue?
                                      by x_orange90_x
                                      Just bought this for 10 bucks yesterday hoping to fix it. The guy said water dropped inside from a dehumidifier hose and it started showing black and white vertical bars then went blank. When I got it home and turned it on it came on fine and displayed correctly but I was noticing faint vertical bars in the image. After a little bit I turned it off and back on and it was a black screen again. I opened it up to check for water damage and corrosion but didn't find anything of the sort. I cleaned the ribbons anyway and reconnected them but still got a blank screen. If I disconnect the right side...
                                      03-29-2025, 11:02 PM
                                    • Chrissygizmo
                                      Samsung UE55JU6800K half screen dark
                                      by Chrissygizmo
                                      Hello everyone, I’ve just been given a Samsung UE55JU6800K smart tv as it had white spots on the screen due to the led lenses falling off. After refitting them & putting the tv back together I thought it was a nice easy fix for a free bedroom tv , then I tried it before screwing the back into place. I realised that the right side of the screen was darker than the other side, I removed the screen again as I thought the backlights had failed but they are fine.
                                      I put the screen back in place & turned it back on . The screen seemed to be ok again but different screens on the same...
                                      02-10-2025, 12:33 AM
                                    • Loading...
                                    • No more items.
                                    Working...