Samsung LN46A650A1F LCD screen issue

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  • ScHAmPi
    Samsung UE48JU7000 screen issue after backlight replacement
    by ScHAmPi
    Hi all,

    Because of two bright spots and a couple of dark spots I decided to replace the backlights in my Samsung UE48JU7000. See attached photos:


    I thought all went well, but after full assembly and testing it out it turns out not all is fine. The backlights are completely fine but I have some weird issues on the right half of the screen. Since I didn't really touch the T-CON board (apart from taking out the ribbons of the display and reconnecting them on assembly) it would be weird that the issue is with the T-CON board... But based on the behavior of the service...
    The before
    2 Photos
    07-15-2024, 05:41 AM
  • Stanley1843
    Screen Display Vertical Multicolor Lines
    by Stanley1843
    Hello, I have a screen in where sometimes when I open it pop-up vertical multicolor lines (I would say the most of them are green). If I tun off and turn on the screen the lines dissapear or if I leave open the screen after approximately five minutes the lines gone. I measured the below voltages on the main PCB and on the T-CON board and the voltages are the same when it doesn’t display the vertical lines and when it displays the vertical lines. Also, I cleaned all the connectors very good with IPA. I moved back and forth the connectors and the COF tabs but the vertical lines didn't displayed...
    06-29-2024, 11:54 AM
  • 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
  • Runlinc
    Samsung QE50Q60TAU - Horizontal screen lines
    by Runlinc
    Hi everyone, the tv was in a continuous reboot cycle. To get the best screen image i can I taped the VGH and VSS pins on the left side buffer board joining ribbon.

    I am left with a good image apart from the black horizontal lines that I cannot get rid of.

    I cannot find anything on the buffer boards that has shorted.

    Do you think there is anything i can do to eliminate the lines, or are they caused by an internal panel short and the image cannot be impoved.

    Many thanks for your assistance
    5 Photos
    05-14-2024, 07:40 AM
  • Ancient1
    Strange LG TV issue : Image vertical lines in black screen
    by Ancient1
    Hi

    Asking for a friend.

    I'm used to black vertical line in otherwise good image - probable solution is a rubber to push and tighten the COFs bonding.
    but here its the opposite !

    TV has new T-con = same issue
    A missing panel voltage would have global effect

    So , what should one do ? how can I find where the fault is ?

    Thanks !...
    02-05-2025, 03:37 PM
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