Samsung UE50TU8070UXZT bootloop display problem

Collapse
X
 
  • Time
  • Show
Clear All
new posts
  • fanaticgames
    Senior Member
    • May 2017
    • 138
    • italy

    #1

    Samsung UE50TU8070UXZT bootloop display problem

    Hi guys I have a problem with this TV, once it is turned on it restarts continuously (only the backlight is present, no image), by disconnecting the flat of the display it remains on regularly, can I solve it with scotch tape? What slopes of the flat can I cover?
    Attached Files
  • nomoresonys
    Badcaps Legend
    • Jan 2013
    • 12091
    • U.S.

    #2
    Re: Samsung UE50TU8070UXZT bootloop display problem

    https://www.youtube.com/watch?v=pfrRhw7-ZII

    Comment

    • fanaticgames
      Senior Member
      • May 2017
      • 138
      • italy

      #3
      Re: Samsung UE50TU8070UXZT bootloop display problem

      Originally posted by nomoresonys
      yes but I can't find the tracks of the clock signal

      Comment

      • howardc64
        Badcaps Veteran
        • Jun 2017
        • 558
        • United States

        #4
        Re: Samsung UE50TU8070UXZT bootloop display problem

        Originally posted by fanaticgames
        yes but I can't find the tracks of the clock signal
        Posted a slide summary on Samsung 4K panel connections. Can help you understand what all the flex connection pins are

        https://www.badcaps.net/forum/showthread.php?t=118541

        Comment

        • fanaticgames
          Senior Member
          • May 2017
          • 138
          • italy

          #5
          Re: Samsung UE50TU8070UXZT bootloop display problem

          Originally posted by howardc64
          Posted a slide summary on Samsung 4K panel connections. Can help you understand what all the flex connection pins are

          https://www.badcaps.net/forum/showthread.php?t=118541
          the problem is only on the right cof, isolating 1 ckv signal you get an image but not acceptable, unfortunately the panel has to be thrown away, samsung rubbish
          Last edited by fanaticgames; 04-28-2023, 05:02 AM.

          Comment

          • fanaticgames
            Senior Member
            • May 2017
            • 138
            • italy

            #6
            Re: Samsung UE50TU8070UXZT bootloop display problem

            With scotch tape, I think the lines next to it didn't make contact, I cut the pcb directly on the ckv signals of the right cof and I got an excellent result, there is only a thin line that comes out intermittently every 10 seconds
            Attached Files

            Comment

            • howardc64
              Badcaps Veteran
              • Jun 2017
              • 558
              • United States

              #7
              Re: Samsung UE50TU8070UXZT bootloop display problem

              Originally posted by fanaticgames
              With scotch tape, I think the lines next to it didn't make contact, I cut the pcb directly on the ckv signals of the right cof and I got an excellent result, there is only a thin line that comes out intermittently every 10 seconds
              This document explains fixing CKV lines on slightly older Samsung TVs. It talks about strap CKV* and CKVB* pairs after disconnecting from the panel. Also possible connect them to GND or VOFF. This is more advanced than I understand. Just FYI

              https://www.electronica-pt.com/esque...-repair-65862/

              This video explains CKV* and CKVB* (B=Bar or inverted signal) are generated from the same source. I guess above author is expecting a fault before CKV/CKVB pair is generated. However, for these newer Samsung Panels, CVK/CKVB comes directly out of the single SOC on main so maybe no longer fault in pairs... I don't really know.

              https://youtu.be/izd7dhtmZjc?t=879
              Last edited by howardc64; 04-28-2023, 05:00 PM.

              Comment

              Related Topics

              Collapse

              • KYBOSH
                Samsung QN75Q70TAF - Problem ON or WITHIN the Display??
                by KYBOSH
                Came across a 75" QLED TV with restart-backlight no boot and it was headed to the dumpster. Asked the owner to let me have a crack at it. They said the TV went out during or soon after a thunderstorm. I noted this but didnt out too much stock into it as it could have been anything.

                VERY big TV and i was worried about the display cracking during the moved as well as the repair but it was alright as i try very hard to handle with care.

                In the video (zip file) you can see' as the TV tries to start up, tbere are a lot of gaps in the backlight so I immediately suspect...
                10-19-2023, 05:33 PM
              • stylishconsultant
                un60j620dafxza - Samsung No Display Problem
                by stylishconsultant
                Hi All,

                Need help.

                I have a samsung un60j620dafxza led tv. When I plug it in it has no display, no sounds, and no standby lights.

                So I opened the tv and disconnected the power to the mainboard and the backlight powered up. This according to many people says that this is a mainboard
                problem. I checked the voltage coming from the stb and I read 1.3 volts on pins 1,3,5 and 7 which are low volts instead of 13 volts which i think the lcd panel
                might be drawing too much power from the power supply that it prevents the right voltage going to the mainboard....
                09-04-2024, 03:26 AM
              • Roccolade
                Samsung QE50Q67T bootloop problem
                by Roccolade
                Hey everyone.

                I have a Samsung QE50Q67TAUXXC (same as Q60T i think) which is experiencing constant bootloop. The picture comes on at first but then it begins to reboot again and again. I tried taping off the pins one by one on the ribbon-cable connecting the two panels at the bottom - and found that the bootloop stops when 1st pin from the left is taped off and the same if the 46th is taped off. (See picture). But unfortunately, I get no image on the screen in those cases.
                The bootloop also stops when the whole right side is disconnected. Which makes me believe the problem...
                09-02-2023, 02:16 PM
              • Neptune06
                Display problem on a Samsung U28E590D
                by Neptune06
                Hello,

                I have a display problem (bad size and color) on a Samsung U28E590D and i'm wondering if someone have access to the service manual for this monitor. I used a faulty Lenovo thunderbolt hub connected to it and now i suspect a problem on the HDMI part of this monitor. The main PCB board part number is: BN94-10748G.

                Thanks for your help.
                10-02-2023, 05:30 AM
              • Document Archive
                Acer Nitro Nitro 5 AN515-45 - (AMD Ryzen 7 5800H, 8 GB, 512GB PCIe NVMe SSD, NVIDIA GeForce RTX 3060 6G, 15.6" FHD IPS 144Hz Display, Windows 10, Black) Notebook 5 Specification for Upgrade or Repair
                by Document Archive
                This specification for the Acer Nitro Nitro 5 AN515-45 - (AMD Ryzen 7 5800H, 8 GB, 512GB PCIe NVMe SSD, NVIDIA GeForce RTX 3060 6G, 15.6" FHD IPS 144Hz Display, Windows 10, Black) Notebook can be useful for upgrading or repairing a laptop that is not working. As a community we are working through our specifications to add valuable data like the Nitro 5 AN515-45 - (AMD Ryzen 7 5800H, 8 GB, 512GB PCIe NVMe SSD, NVIDIA GeForce RTX 3060 6G, 15.6" FHD IPS 144Hz Display, Windows 10, Black) boardview and Nitro 5 AN515-45 - (AMD Ryzen 7 5800H, 8 GB, 512GB PCIe NVMe SSD, NVIDIA GeForce RTX 3060...
                09-06-2024, 10:20 PM
              • Loading...
              • No more items.
              Working...