samsung qn55q7famxza blurry picture

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  • nwelec
    Senior Member
    • Dec 2014
    • 61
    • usa
    #1

    samsung qn55q7famxza blurry picture

    Very blurry picture. Changed the one connect box and same problem. Tried disconnecting one side of the tcon but I guess that no longer shows half of the tv picture so I am kind of stuck. I would normally think the Tcon is the problem but other than ebay it is not in stock for a fair price, and on ebay it is $100.00. Hope anyone here can help.
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    • budm
      Badcaps Legend
      • Feb 2010
      • 40746
      • USA
      #2
      Re: samsung qn55q7famxza blurry picture

      https://www.badcaps.net/forum/attach...1&d=1577483494'
      Double-image is usually panel Gate drive issue.
      But at this point you no longer get anything on the screen?
      Did you verify that the ribbon cables are not damaged or verify that they are put back in place correctly?
      Never stop learning
      Basic LCD TV and Monitor troubleshooting guides.
      http://www.badcaps.net/forum/showthr...956#post305956

      Voltage Regulator (LDO) testing:
      http://www.badcaps.net/forum/showthr...999#post300999

      Inverter testing using old CFL:
      http://www.badcaps.net/forum/showthr...er+testing+cfl

      Tear down pictures : Hit the ">" Show Albums and stories" on the left side
      http://s807.photobucket.com/user/budm/library/

      TV Factory reset codes listing:
      http://www.badcaps.net/forum/showthread.php?t=24809

        Comment

        • Davi.p
          Badcaps Legend
          • Sep 2009
          • 4271
          • Italy - Milan
          #3
          Re: samsung qn55q7famxza blurry picture

          I don't think it has gate drivers , i think it's a QLED panel and the tech behind that is not much known, we need better pictures 'cause is not photographed the main/av board and the board that resembles a tcon must be better caught in zoomed pict without the shield.

            Comment

            • budm
              Badcaps Legend
              • Feb 2010
              • 40746
              • USA
              #4
              Re: samsung qn55q7famxza blurry picture

              Originally posted by Davi.p
              I don't think it has gate drivers , i think it's a QLED panel and the tech behind that is not much known, we need better pictures 'cause is not photographed the main/av board and the board that resembles a tcon must be better caught in zoomed pict without the shield.
              The so called QLED TV is still using LCD panel topology and LED backlight.
              https://www.cnet.com/news/qled-vs-ol...20-comparison/
              Quantum dots are microscopic molecules that, when hit by light, emit their own, differently colored light. In QLED TVs, the dots are contained in a film, and the light that hits them is provided by an LED backlight. That light then travels though a few other layers inside the TV, including a liquid crystal (LCD) layer, to create the picture. The light from the LED source is transmitted through the layers to the screen's surface, which is why we say it's "transmissive."
              Last edited by budm; 12-28-2019, 04:10 PM.
              Never stop learning
              Basic LCD TV and Monitor troubleshooting guides.
              http://www.badcaps.net/forum/showthr...956#post305956

              Voltage Regulator (LDO) testing:
              http://www.badcaps.net/forum/showthr...999#post300999

              Inverter testing using old CFL:
              http://www.badcaps.net/forum/showthr...er+testing+cfl

              Tear down pictures : Hit the ">" Show Albums and stories" on the left side
              http://s807.photobucket.com/user/budm/library/

              TV Factory reset codes listing:
              http://www.badcaps.net/forum/showthread.php?t=24809

                Comment

                • nwcs
                  Badcaps Veteran
                  • Dec 2015
                  • 311
                  • usa
                  #5
                  Re: samsung qn55q7famxza blurry picture

                  I get a blurry pic if the flat cables to the panel are connected. If I disconnect one side or the other then no picture at all. I will try and get a better pic of the Tcon next week but with all of my medical appts and the holidays it may not happen. I will try and see if there is any damage to the gate drivers on the panel but not sure when that will happen.

                    Comment

                    • Davi.p
                      Badcaps Legend
                      • Sep 2009
                      • 4271
                      • Italy - Milan
                      #6
                      Re: samsung qn55q7famxza blurry picture

                      Why do you have a multiple account? I ask to the moderators or admin if it is possible...

                        Comment

                        • noonyf
                          New Member
                          • Jan 2014
                          • 5
                          • usa
                          #7
                          Re: samsung qn55q7famxza blurry picture

                          I need help with a 75" model like this one. with the one connect cable disconnected I see the "disconnect banner". when I connected the cable, the picture is distorted like a checker board. I ordered a new one connect cable and now i have no Image at all but the backlight changes as if video content were there. I have tried a different one connect box with the same results. Do I have a new defective one connect cable? thanks

                            Comment

                            • nwcs
                              Badcaps Veteran
                              • Dec 2015
                              • 311
                              • usa
                              #8
                              Re: samsung qn55q7famxza blurry picture

                              I would suspect the main board.

                                Comment

                                • Davi.p
                                  Badcaps Legend
                                  • Sep 2009
                                  • 4271
                                  • Italy - Milan
                                  #9
                                  Re: samsung qn55q7famxza blurry picture

                                  Is your fault the same as the OP? If not why not to open a new thread? This is the way to make jamming..

                                    Comment

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