Samsung LNT4671F 4671FX/XAA Horizontal picture skipping...then I screwed up

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  • DXseekerMO
    Badcaps Legend
    • Feb 2018
    • 1119
    • US

    #1

    Samsung LNT4671F 4671FX/XAA Horizontal picture skipping...then I screwed up

    The other night I saw this TV for free on a local website. It was close, so I picked it up.

    The symptoms were a picture that was horizontally choppy and jumpy. On initial start-up the channel would display in the corner. Everything looks fine until the picture starts...then it goes horizontally jumpy, menu and all. It looked like the TV was confused upon the horizontal placement of the picture on the screen, like the horizontal hold being off on an old CRT set, but completely unstable and unpredictable. Sometimes the screen is split in multiple horizontal layers that randomly and constantly change.

    Upon the background picture going black, like during a gap between programming or by disconnecting the coax from the "megatenna" the menu was stable 99% of the time, with only an occasional glitch in its placement. The picture would stabilize for a few seconds with a less intense or darker picture on the screen, like before "Just For Us" cuts to the show name the picture is "confused". When it goes to black and the show name drops in on the right in yellow it shows perfectly.

    Unfortunately the operative word here is "WAS".

    I have no idea what this shart for brains was thinking, but after a little research I began pressing on the cable connections at the t-con board. I thought I noticed a change in the picture stability, so I lifted the lock bar at the left ribbon cable and pulled it out.....with the TV still on. If that weren't bad enough I stuck it right back in with it powered up. I saw an arc on the strip....and wound up with the descriptors above.....and a solarized screen. A little later and now there's no picture. Backlights on, black screen.

    Unplugging that infernal thing with the unit on was completely stupid. Messing with it further earns me the title of shart for brains of the day, at least.

    I'm just wondering if I put the final toasting on a t-con board that was already bad to begin with, or did I just fry it in to oblivion? Thanks for helping the "Technologically Challenged"!
    Last edited by DXseekerMO; 02-27-2018, 09:27 PM. Reason: Model no correction
    They call me......."threadkiller"
  • DXseekerMO
    Badcaps Legend
    • Feb 2018
    • 1119
    • US

    #2
    Re: Samsung LNT4671F 4671FX/XAA Horizontal picture skipping...then I screwed up

    Also the processor chip on the t-con is stone cold, like the board isn't powered up. No voltage on output side and input side hovers around 1.2v dc. Help?
    They call me......."threadkiller"

    Comment

    • freakaftr8
      Badcaps Legend
      • Oct 2012
      • 3743
      • USA

      #3
      Re: Samsung LNT4671F 4671FX/XAA Horizontal picture skipping...then I screwed up

      You probably took out the gamma processor on the tcon. The jumpy horizontal picture is most likely caused by a badd panel to start with. This model does not have horizontal tabs drivers so it requires the source drivers to deliver data to the horizontal quarter of the screen. You might have a badd connection on one of the source driver tabs that are fused through the panel. You could try taking the metal frame off and pressing on the ribbons gently where they attach into the panel itself especially on the far right and far left ribbons. Right there is a chance that you could have done damage to the panel by removing and re attaching the ribbon.

      Look for a chip on the tcon labeled AS15.
      Did I leave the soldering iron on?

      Comment

      • DXseekerMO
        Badcaps Legend
        • Feb 2018
        • 1119
        • US

        #4
        Re: Samsung LNT4671F 4671FX/XAA Horizontal picture skipping...then I screwed up

        The only A designation I see is AR15 on the tcon. Is that what got cooked?
        They call me......."threadkiller"

        Comment

        • DXseekerMO
          Badcaps Legend
          • Feb 2018
          • 1119
          • US

          #5
          Re: Samsung LNT4671F 4671FX/XAA Horizontal picture skipping...then I screwed up

          OK I found it. And the color green of this t-con board does not match the green on the rest of the boards. I can't seem to find a date or date code either, but the other boards have dates within a couple days of one another. Does that mean this is a replacement t-con possibly?
          They call me......."threadkiller"

          Comment

          • freakaftr8
            Badcaps Legend
            • Oct 2012
            • 3743
            • USA

            #6
            Re: Samsung LNT4671F 4671FX/XAA Horizontal picture skipping...then I screwed up

            Possible but When a panel is manufactured, the tcon always goes with the panel then you add the subassembly boards and the frame to complete the television. So it is very possible that the t con will not match the other boards.
            Did I leave the soldering iron on?

            Comment

            • DXseekerMO
              Badcaps Legend
              • Feb 2018
              • 1119
              • US

              #7
              Re: Samsung LNT4671F 4671FX/XAA Horizontal picture skipping...then I screwed up

              Do you think my screw up cascaded down to the logic and main boards?
              They call me......."threadkiller"

              Comment

              • freakaftr8
                Badcaps Legend
                • Oct 2012
                • 3743
                • USA

                #8
                Re: Samsung LNT4671F 4671FX/XAA Horizontal picture skipping...then I screwed up

                Doubt it. Mainboard is probably fine. But there's a slight possibility that the skipping can be caused by mainboard thou.
                Did I leave the soldering iron on?

                Comment

                • nomoresonys
                  Badcaps Legend
                  • Jan 2013
                  • 12206
                  • U.S.

                  #9
                  Re: Samsung LNT4671F 4671FX/XAA Horizontal picture skipping...then I screwed up

                  http://www.shopjimmy.com/samsung-bn8...-con-board.htm good pic.
                  Maybe test the fuse on the tcon too, labeled F1.
                  Quit because THIS SITE LETS A ROGUE MEMBER TYPE ANY GARBAGE HE PLEASES AND THE POWERS THAT BE NEVER DO ANYTHING ABOUT IT SO HE NEVER QUITS. THEN YOU GET A PENALTY FOR RESPONDING TO HIS ATTACKS. BEEN GOING ON FOR WAY TOO LONG. DONE SUPPORTING A SITE THAT ALLOWS THIS BS.

                  Comment

                  • nomoresonys
                    Badcaps Legend
                    • Jan 2013
                    • 12206
                    • U.S.

                    #10
                    Re: Samsung LNT4671F 4671FX/XAA Horizontal picture skipping...then I screwed up

                    https://www.youtube.com/watch?v=yTnkOfwBGGE tcon testing.
                    Quit because THIS SITE LETS A ROGUE MEMBER TYPE ANY GARBAGE HE PLEASES AND THE POWERS THAT BE NEVER DO ANYTHING ABOUT IT SO HE NEVER QUITS. THEN YOU GET A PENALTY FOR RESPONDING TO HIS ATTACKS. BEEN GOING ON FOR WAY TOO LONG. DONE SUPPORTING A SITE THAT ALLOWS THIS BS.

                    Comment

                    • DXseekerMO
                      Badcaps Legend
                      • Feb 2018
                      • 1119
                      • US

                      #11
                      Re: Samsung LNT4671F 4671FX/XAA Horizontal picture skipping...then I screwed up

                      Originally posted by freakaftr8
                      Doubt it. Mainboard is probably fine. But there's a slight possibility that the skipping can be caused by mainboard thou.
                      Could that explain the same glitch with the menus? They jump around on occasion too. Or is that from the logic board?

                      Originally posted by nomoresonys
                      Maybe test the fuse on the tcon too, labeled F1.
                      I checked the videos out, thanks for posting the link. I've been looking at the t-con board for an hour and I can't find a fuse marked F1. Can you give me a general idea where it is?

                      I need a lighted magnifying glass soooooo bad.
                      They call me......."threadkiller"

                      Comment

                      • will62
                        Badcaps Veteran
                        • Dec 2016
                        • 229
                        • usa

                        #12
                        Re: Samsung LNT4671F 4671FX/XAA Horizontal picture skipping...then I screwed up

                        Does this one look like yours?
                        Attached Files

                        Comment

                        • freakaftr8
                          Badcaps Legend
                          • Oct 2012
                          • 3743
                          • USA

                          #13
                          Re: Samsung LNT4671F 4671FX/XAA Horizontal picture skipping...then I screwed up

                          Yes the glitch can be caused by a bad mainboard with the flickering in the vertical jumpiness, Although this could also be a problem with the LCD panel itself as there could be a driver failing inside the panel, Could also be a tab bond failu re.
                          Did I leave the soldering iron on?

                          Comment

                          • DXseekerMO
                            Badcaps Legend
                            • Feb 2018
                            • 1119
                            • US

                            #14
                            Re: Samsung LNT4671F 4671FX/XAA Horizontal picture skipping...then I screwed up

                            Originally posted by will62
                            Does this one look like yours?
                            Yes that looks like it.

                            Originally posted by freakaftr8
                            Yes the glitch can be caused by a bad mainboard with the flickering in the vertical jumpiness, Although this could also be a problem with the LCD panel itself as there could be a driver failing inside the panel, Could also be a tab bond failu re.
                            Right on. It still has good parts in it so it's not a loss at least!
                            They call me......."threadkiller"

                            Comment

                            • nomoresonys
                              Badcaps Legend
                              • Jan 2013
                              • 12206
                              • U.S.

                              #15
                              Re: Samsung LNT4671F 4671FX/XAA Horizontal picture skipping...then I screwed up

                              Originally posted by DXseekerMO
                              Could that explain the same glitch with the menus? They jump around on occasion too. Or is that from the logic board?



                              I checked the videos out, thanks for posting the link. I've been looking at the t-con board for an hour and I can't find a fuse marked F1. Can you give me a general idea where it is?

                              I need a lighted magnifying glass soooooo bad.
                              No problem, hey diif look there, seems like the videos ARE pretty useful after all.
                              Quit because THIS SITE LETS A ROGUE MEMBER TYPE ANY GARBAGE HE PLEASES AND THE POWERS THAT BE NEVER DO ANYTHING ABOUT IT SO HE NEVER QUITS. THEN YOU GET A PENALTY FOR RESPONDING TO HIS ATTACKS. BEEN GOING ON FOR WAY TOO LONG. DONE SUPPORTING A SITE THAT ALLOWS THIS BS.

                              Comment

                              • nomoresonys
                                Badcaps Legend
                                • Jan 2013
                                • 12206
                                • U.S.

                                #16
                                Re: Samsung LNT4671F 4671FX/XAA Horizontal picture skipping...then I screwed up

                                Originally posted by nomoresonys
                                No problem, hey diif look there, seems like the videos ARE pretty useful after all.
                                Our "pal" diff, said they were useless, ummm I guess because you can't see what they are doing but most of them are very well done. "My pal" diif just informed me that "pros work for cash" maybe that's why he never helps and is always begging for leds.
                                Last edited by nomoresonys; 03-02-2018, 06:07 AM.
                                Quit because THIS SITE LETS A ROGUE MEMBER TYPE ANY GARBAGE HE PLEASES AND THE POWERS THAT BE NEVER DO ANYTHING ABOUT IT SO HE NEVER QUITS. THEN YOU GET A PENALTY FOR RESPONDING TO HIS ATTACKS. BEEN GOING ON FOR WAY TOO LONG. DONE SUPPORTING A SITE THAT ALLOWS THIS BS.

                                Comment

                                • Topcat
                                  The Boss Stooge
                                  • Oct 2003
                                  • 16956
                                  • United States

                                  #17
                                  Re: Samsung LNT4671F 4671FX/XAA Horizontal picture skipping...then I screwed up

                                  lets all be friends for crying out loud.....
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                                  • DXseekerMO
                                    Badcaps Legend
                                    • Feb 2018
                                    • 1119
                                    • US

                                    #18
                                    Re: Samsung LNT4671F 4671FX/XAA Horizontal picture skipping...then I screwed up

                                    Heck there boss you are about 80 miles from me!
                                    They call me......."threadkiller"

                                    Comment

                                    • nomoresonys
                                      Badcaps Legend
                                      • Jan 2013
                                      • 12206
                                      • U.S.

                                      #19
                                      Re: Samsung LNT4671F 4671FX/XAA Horizontal picture skipping...then I screwed up

                                      n/a
                                      Quit because THIS SITE LETS A ROGUE MEMBER TYPE ANY GARBAGE HE PLEASES AND THE POWERS THAT BE NEVER DO ANYTHING ABOUT IT SO HE NEVER QUITS. THEN YOU GET A PENALTY FOR RESPONDING TO HIS ATTACKS. BEEN GOING ON FOR WAY TOO LONG. DONE SUPPORTING A SITE THAT ALLOWS THIS BS.

                                      Comment

                                      • Topcat
                                        The Boss Stooge
                                        • Oct 2003
                                        • 16956
                                        • United States

                                        #20
                                        Re: Samsung LNT4671F 4671FX/XAA Horizontal picture skipping...then I screwed up

                                        Originally posted by DXseekerMO
                                        Heck there boss you are about 80 miles from me!
                                        If you're ever passing by the area, shoot me a PM.
                                        <--- Badcaps.net Founder

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                                        http://folding.stanford.edu/
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