Samsung LA40F81BDX problem

Collapse
X
 
  • Time
  • Show
Clear All
new posts
  • Begbie
    Member
    • Oct 2013
    • 16
    • Australia

    #1

    Samsung LA40F81BDX problem

    Ive got a curious one here. I have a LA40F81BDX it was a great TV until it has suddenly developed a screen problem. I have checked the PS for the regular problems (bad caps) but to no avail, I have also changed out the T-Con board and had no luck. It appears everything is working fine (sound, etc) and on pressing the menu button the screen does change to a different image.

    I just need to know what else to try or if I am wasting my time. Thanks!



    Attached Files
  • stj
    Great Sage 齊天大聖
    • Dec 2009
    • 30950
    • Albion

    #2
    Re: Samsung LA40F81BDX problem

    could be a bad vram.
    if it's bga your in trouble, but if it's tsop you may find a compatable chip on a scrap board to swap over.

    could be something else too - but ram is the most unreliable type of chips.

    Comment

    • budm
      Badcaps Legend
      • Feb 2010
      • 40746
      • USA

      #3
      Re: Samsung LA40F81BDX problem

      So it shows just lines on the screen and no image on the back ground?
      How many ribbon cables it has between the T-CON and the LCD panel? I would try having one ribbon cable connected one at a time to see what you get on the screen.
      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

      • Begbie
        Member
        • Oct 2013
        • 16
        • Australia

        #4
        Re: Samsung LA40F81BDX problem

        Originally posted by budm
        So it shows just lines on the screen and no image on the back ground?
        How many ribbon cables it has between the T-CON and the LCD panel? I would try having one ribbon cable connected one at a time to see what you get on the screen.
        IT definitely has two. I will try this and let you know.

        Comment

        • tom66
          EVs Rule
          • Apr 2011
          • 32560
          • UK

          #5
          Re: Samsung LA40F81BDX problem

          Not vram IMHO as image is not perfectly even (image slightly fades.)
          Probably panel defect.
          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

          • Begbie
            Member
            • Oct 2013
            • 16
            • Australia

            #6
            Re: Samsung LA40F81BDX problem

            OK there is four ribbon cables between the TCon and the panel. On removing them each in turn I get very similar results to the existing problem although the vertical patterns are slightly different and in one instance the half the panel is all white.

            Comment

            • budm
              Badcaps Legend
              • Feb 2010
              • 40746
              • USA

              #7
              Re: Samsung LA40F81BDX problem

              I agree with Tom.
              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

              • Begbie
                Member
                • Oct 2013
                • 16
                • Australia

                #8
                Re: Samsung LA40F81BDX problem

                Thanks guys

                Comment

                Related Topics

                Collapse

                • 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
                • mmccomputer
                  problem with replacing lcd screen
                  by mmccomputer
                  I have an HP model : 14-cf0011nf and I want to change its display screen (it has an original 14" full HD TN 30 pins panel) which works without problem but I want to put another screen with an IPS panel, the problem is that I tried several screens but there is no display except with the original screen, I never had this problem before I changed hundreds without problems but this PC is not 'accepted than its original screen
                  otherwise on the motherboard it displays edp and I don't know, do the panels I tried only work with the LVDS protocol?
                  If anyone has any information on the subject...
                  12-15-2024, 03:44 PM
                • Chrissygizmo
                  samsung galaxy ao2s very temperamental after screen replaced
                  by Chrissygizmo
                  Hi , I've recently replaced the screen in my Samsung galaxy ao2s, at first it wouldn't even turn on, it had the charging symbol on the screen when plugged in but the green circle wasn't going around to show it charging....
                  Ive eventually managed to get it on and working but it's very temperamental...

                  The battery icon always reads as 50% , when the phone goes into lock screen mode i sometimes can't get the screen back on unless I plug the charger in to get it to light up, also it keeps putting the camera app on.. u think it could be something to do with the side buttons. ...
                  05-26-2024, 12:05 AM
                • jimjoe123
                  LCD TV Green/Pink screen problem
                  by jimjoe123
                  I have a Dick Smith 37" LCD TV, Model GE6804. I am using it as PC extended monitor only.

                  Problem is while watching tv, I hear a semi loud click(like a electrical breaker tripping due to overload, just sound like it but no actual electrical overload), then screen is covered with green or pink. I can still see the original picture image but overlayed by green or pink. See attached images. Pink.jpg is what I see, and Normal.jpg is before green or pink screen, What I captured was pink screen, but about 80% of time it's green and 20% of time it's pink.

                  Then each time...
                  02-23-2020, 01:29 AM
                • CityZen
                  Samsung un48ju6700 half screen ghosting problem
                  by CityZen
                  This curved LCD TV has an issue affecting just the right side of the screen. It is not a backlight issue, although it might appear so from one of the attached images. The problem appears to be the right side of the screen not updating properly. Moving images on the very right side will leave a trail of ghost images. Although even just the computer cursor sitting still makes a vertical ghost band the entire height of the image. The color on the right side also looks like it doesn't have the full bit depth (the Windows background looked kind of dithered on that side).

                  I went into...
                  11-24-2021, 12:03 AM
                • Loading...
                • No more items.
                Working...