LG 47LC7DF panel question

Collapse
X
Collapse
 
  • Page of 1
  • Time
  • Show
Clear All
new posts
Previous template Next
  • crosstalk
    Senior Member
    • Feb 2014
    • 68
    • Usa
    #1

    LG 47LC7DF panel question

    I picked up an LG 47LC7DF that wouldn't power on. Replaced 5 bad caps on the power supply and back in business. Next problem is there are several small semi-circular defects at the top of the panel that fade away as the panel warms up (10 mins or so). See photo attached.

    I would like to reseat the tcon to panel ribbons, but it looks like a lot of work to remove the tcon on this model (lots of support structure in the way on this older model set). Any idea if I am wasting my time trying to get to the tcon to fix this picture problem?
    Attached Files
    Tags: None
    • heavymachines
      Badcaps Legend
      • Mar 2011
      • 1028
      • United States
      #2
      Re: LG 47LC7DF panel question

      Working on this problem as well after replacing all the primary caps except some bigger ones but set come on fine every time now as it had intermittent turn on issues the 5 volt stby was original problem as it was too low, replace all little caps in primary fixed that. However after warming this set up the rings at top of screen almost goes away completely but still there very very faintly. Anyone have any idea what this could be?





      P.S. Resetting cable from t-con didn't have any affect... I tried shotgunning with hair dryer so far no affect. Just plain weird...

        Comment

        • heavymachines
          Badcaps Legend
          • Mar 2011
          • 1028
          • United States
          #3
          Re: LG 47LC7DF panel question

          Problem is same as OP weird yellow half rings at top of screen...

            Comment

            • dskall
              Badcaps Legend
              • Oct 2016
              • 2905
              • usa
              #4
              Re: LG 47LC7DF panel question

              Are they still there when you disconnect ribbon cables?
              I assume no responsibility for any stupid suggestions I might post.

                Comment

                • attainteddragon
                  Badcaps Veteran
                  • Apr 2013
                  • 764
                  • australia
                  #5
                  Re: LG 47LC7DF panel question

                  looks like the diffuser sheet is sagging a little to me and the backlight is reflecting through the edge.
                  WHY CAN'T PHILIPS USE PHILLIPS HEAD SCREWS?

                    Comment

                    Previous template Next

                    Related Topics

                    Collapse
                    • x_orange90_x
                      TCL 50S535 bad tcon or panel issue?
                      by x_orange90_x
                      Just bought this for 10 bucks yesterday hoping to fix it. The guy said water dropped inside from a dehumidifier hose and it started showing black and white vertical bars then went blank. When I got it home and turned it on it came on fine and displayed correctly but I was noticing faint vertical bars in the image. After a little bit I turned it off and back on and it was a black screen again. I opened it up to check for water damage and corrosion but didn't find anything of the sort. I cleaned the ribbons anyway and reconnected them but still got a blank screen. If I disconnect the right side...
                      03-29-2025, 11:02 PM
                    • advant
                      Driving a Sharp TCON/panel with a universal main board
                      by advant
                      This thread is about trying to get an Universal Main Board to work with a Sharp TCON and panel.

                      I have a Sharp LC-46D85UN TV that has had a main board issue. Since this model is from 2009, I am not able to find an exact replacement of the main board. Instead, I decided to see if I can future proof this tv by getting a Universal Main Board (T53U21.2) from China to work with the Sharp TCON (CPWBX4291TPZA) and panel. The universal main board supports a 8 bit dual channel LVDS interface whereas the TCON requires a 10 bit dual channel LVDS input. I have modded the LVDS connector to match...
                      02-03-2020, 12:25 AM
                    • mmartell
                      General Questions on the Relationship Between Mainboard, TCON and Panel
                      by mmartell
                      My goal here is to be able to use boards on hand to swap into faulty sets when the faulty board is not obvious.

                      I will start by asking what is the format of the output from the mainboard and is it generic in any way or does it vary by manufacturer and/or model ?
                      ​
                      And as far as I know a tcon and panel must be a matching pair because the timing of the signals and the voltages required to drive the panel are specific to the panel itself. (That may be a blanket statement that isn't true in some cases where the panel creates its own sub-voltages on its panel boards?)...
                      01-06-2024, 01:32 PM
                    • Lee M.
                      Amazon Fire TV Omni K24NE5 tcon or panel bad?
                      by Lee M.
                      TV came on with BL on but blank screen. Disconnected one of the ribbon cables from tcon to panel driver board and now I have half of the screen working normally. Any way to tell if the problem is with the tcon or the panel driver board or the panel itself? Should I just replace the tcon and see what happens?
                      05-12-2023, 05:47 PM
                    • rimwall
                      Sony KD-65x8500b - bad Tcon or panel?
                      by rimwall
                      Hi, hoping for some views on this one which I've not come across before. The TV generates an image that has 12 noticeable bands across it. The image is still there and accurate, but the colour (or perhaps the brightness) changes gradually across each band which creates a noticeable 'step change' at the edge of each band. Given it's a 4K TV with 2160 rows of pixels, I'm guessing the 12 bands correspond to 12 gate drivers of 180 rows each. If this guess is right, then perhaps:
                      a) all the gate drivers are malfunctioning the same way (which seems unlikely), or
                      b) the Tcon board is malfunctioning,...
                      10-24-2023, 07:58 PM
                    • Loading...
                    • No more items.
                    Working...