Samsung UE46C7000 Single Verticle Line from Cold boot

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  • DemonBG
    Senior Member
    • Mar 2012
    • 143
    • USA

    #1

    Samsung UE46C7000 Single Verticle Line from Cold boot

    Hello All,


    Ok so i picked up this set yesterday - All of it seems to work other than one small issue; When the TV is cold i get a single vertical line of pixels about half way down the screen which isnt the correct colors.
    As soon as the set warms up it completely goes away...

    I tried to take a picture but it wasnt cold enough this morning for it to happen.


    May be difficult to say, but is this likely to be a panel issue?

    Regards,

    Demon
  • Moreno83
    Badcaps Legend
    • Jun 2014
    • 2008
    • The Netherlands

    #2
    Re: Samsung UE46C7000 Single Verticle Line from Cold boot

    Is the screen cut in half or just a small line? I would remove the shield and push on the tabs.
    I only repair Panasonic plasma tv's! Currently owning a TX-P55VT50 and still searching for a ZT60!

    Comment

    • DemonBG
      Senior Member
      • Mar 2012
      • 143
      • USA

      #3
      Re: Samsung UE46C7000 Single Verticle Line from Cold boot

      Just a single line of pixels which is a different color. again, it becomes good within 10 seconds or so...

      Is this likely to get worse over time do you think if left untreated or should i tear it down and put some thermal pads on the tab bonds?

      Comment

      • Moreno83
        Badcaps Legend
        • Jun 2014
        • 2008
        • The Netherlands

        #4
        Re: Samsung UE46C7000 Single Verticle Line from Cold boot

        It will go worse.
        Maybe just leave the tv off and remove the shield. So when its cold and you turn it on you can see if pressing the tabs will fix the problem?
        I only repair Panasonic plasma tv's! Currently owning a TX-P55VT50 and still searching for a ZT60!

        Comment

        • tom66
          EVs Rule
          • Apr 2011
          • 32560
          • UK

          #5
          Re: Samsung UE46C7000 Single Verticle Line from Cold boot

          Yes I have seen this fault before. It will only get worse and other lines will appear shortly afterwards.
          Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
          For service manual, schematic, boardview (board view), datasheet, cad - use our search.

          Comment

          • DemonBG
            Senior Member
            • Mar 2012
            • 143
            • USA

            #6
            Re: Samsung UE46C7000 Single Verticle Line from Cold boot

            Well thats dissapointing... Is this a Tab bond issue Tom? Is there anything i can do to get more life out of it or slow down the degredation?

            Thanks,
            Demon

            Comment

            • tom66
              EVs Rule
              • Apr 2011
              • 32560
              • UK

              #7
              Re: Samsung UE46C7000 Single Verticle Line from Cold boot

              It is similar to a tab bond issue but it is a failure of the bonding between the IC and the flex that makes the "tab driver". I have tried before to fix it with hot air, but with no luck. It lasted about a 1/2 hour then failed again. (Though on my set the line was there from the start.)
              Last edited by tom66; 11-02-2014, 07:43 AM.
              Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
              For service manual, schematic, boardview (board view), datasheet, cad - use our search.

              Comment

              • DemonBG
                Senior Member
                • Mar 2012
                • 143
                • USA

                #8
                Re: Samsung UE46C7000 Single Verticle Line from Cold boot

                from what i hear, they usually run fairl warm... I might try adding some thermal pads onto the IC's to draw some heat out of them. It may at least slow down their degredation...

                Will let you know how it works out.

                Comment

                • tibimakai
                  Badcaps Legend
                  • Jan 2012
                  • 3680
                  • USA

                  #9
                  Re: Samsung UE46C7000 Single Verticle Line from Cold boot

                  Tom, you should try a C clamp. Just kidding.
                  C series has panel issues, that is something new.

                  Comment

                  • tom66
                    EVs Rule
                    • Apr 2011
                    • 32560
                    • UK

                    #10
                    Re: Samsung UE46C7000 Single Verticle Line from Cold boot

                    Every Samsung... no every LCD TV has panel issues.
                    Plasma too, but far rarer.
                    Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
                    For service manual, schematic, boardview (board view), datasheet, cad - use our search.

                    Comment

                    • DemonBG
                      Senior Member
                      • Mar 2012
                      • 143
                      • USA

                      #11
                      Re: Samsung UE46C7000 Single Verticle Line from Cold boot

                      I have had a few C series TV's - the 2D version (C6XXX) usually have good panels and poor main boards, the C7XXX and C8XXX are the 3D models which from what i gather have reliable main boards but unreliable panels...

                      Tom - Will putting Thermal pads between the IC and the frame help prolong the life of the panel? My theory is that it will help both draw the heat out of the IC and put a little pressure on it...

                      Regards,
                      Demon

                      Comment

                      • tom66
                        EVs Rule
                        • Apr 2011
                        • 32560
                        • UK

                        #12
                        Re: Samsung UE46C7000 Single Verticle Line from Cold boot

                        Originally posted by DemonBG
                        Tom - Will putting Thermal pads between the IC and the frame help prolong the life of the panel? My theory is that it will help both draw the heat out of the IC and put a little pressure on it...
                        Well, the failure has already occurred, so it might delay the onset of symptoms... but I don't expect it to fix it. It will only go bad later.

                        By the way my brother just sent me a picture of his Samsung UE46EH8000 (top-of-the-line Smart 46" FullHD 3D LED TV)…........ the panel has gone bad. Out of warranty by 18 months. I did tell him not to buy a Samsung, and then he goes out and buys another one to replace it. At least, I think I'll be able to get the old one, if only for the spare parts.
                        Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
                        For service manual, schematic, boardview (board view), datasheet, cad - use our search.

                        Comment

                        • tibimakai
                          Badcaps Legend
                          • Jan 2012
                          • 3680
                          • USA

                          #13
                          Re: Samsung UE46C7000 Single Verticle Line from Cold boot

                          I have seen this, with many people.
                          They have a broken TV of a certain brand and they buy the same brand again.

                          Comment

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