LG 50PC3D Plasma -bad caps or is there more to this?

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  • nanosec
    New Member
    • May 2011
    • 7
    #1

    LG 50PC3D Plasma -bad caps or is there more to this?




    I'm counting 7 bulging capacitors on the power supply board, and none on the other boards.

    Just wondering if this is the z-sus board or the other boards?

    What would your best guess be based on these pictures?
    If I replace the bad caps do you think this problem will go away?


    I am by no means an expert, but I am a quick study on things, here's hoping I can fix this.

    Thank you in advance for your time, believe me, I appreciate it!
    Tags: None
    • PlainBill
      Badcaps Legend
      • Feb 2009
      • 7034
      • USA
      #2
      Re: LG 50PC3D Plasma -bad caps or is there more to this?

      Originally posted by nanosec
      I'm counting 7 bulging capacitors on the power supply board, and none on the other boards.

      Just wondering if this is the z-sus board or the other boards?

      What would your best guess be based on these pictures?
      If I replace the bad caps do you think this problem will go away?


      I am by no means an expert, but I am a quick study on things, here's hoping I can fix this.

      Thank you in advance for your time, believe me, I appreciate it!
      Don't post pictures inline, it slows loading pages and inconveniences the experts like retiredcaps, as well as annoying others - like me. Use 'Manage Attachments' (under the text entry area).

      That doesn't look like a Z-sustain problem, but I could be wrong. The first step would be to replace the bulging caps. If you live in the USA 7 caps from Digikey will probably cost you about $10, including shipping.

      PlainBill
      For a number of reasons, both health and personal, I will no longer be active on this board. Any PMs asking for assistance will be ignored.

      Never be afraid to try something new. Remember, amateurs built the ark. Professionals built the Titanic.

        Comment

        • Village Electronics
          OldPro
          • Apr 2011
          • 118
          #3
          Re: LG 50PC3D Plasma -bad caps or is there more to this?

          Originally posted by nanosec


          I'm counting 7 bulging capacitors on the power supply board, and none on the other boards.

          Just wondering if this is the z-sus board or the other boards?

          What would your best guess be based on these pictures?
          If I replace the bad caps do you think this problem will go away?


          I am by no means an expert, but I am a quick study on things, here's hoping I can fix this.

          Thank you in advance for your time, believe me, I appreciate it!
          Obviously you replace caps that appear to be bad. I would suspect the buffer(s) to be the problem with this symptom.

            Comment

            • nanosec
              New Member
              • May 2011
              • 7
              #4
              Re: LG 50PC3D Plasma -bad caps or is there more to this?

              Originally posted by PlainBill
              Don't post pictures inline, it slows loading pages and inconveniences the experts like retiredcaps, as well as annoying others - like me. Use 'Manage Attachments' (under the text entry area).
              Sorry guys, I don't see a way to edit my post, otherwise I would change it immediately. (is there a timer on the edit button?)

              Thanks, I will replace the caps and see how it goes, and please advise if you want me to upload the images as attachments as per your requests either later in this thread or however you want.
              Last edited by nanosec; 05-28-2011, 08:17 AM.

                Comment

                • nanosec
                  New Member
                  • May 2011
                  • 7
                  #5
                  Re: LG 50PC3D Plasma -bad caps or is there more to this?

                  Just finished replacing capacitors. Powers up fine, but problem still exists.

                    Comment

                    • Village Electronics
                      OldPro
                      • Apr 2011
                      • 118
                      #6
                      Re: LG 50PC3D Plasma -bad caps or is there more to this?

                      Originally posted by nanosec
                      Just finished replacing capacitors. Powers up fine, but problem still exists.
                      buffer(s)

                        Comment

                        • nanosec
                          New Member
                          • May 2011
                          • 7
                          #7
                          Re: LG 50PC3D Plasma -bad caps or is there more to this?

                          Thanks guys, appreciate your help and please forgive my image faux pas
                          Any recommended source for rebuild or replacement boards?

                            Comment

                            • retiredcaps
                              Badcaps Legend
                              • Apr 2010
                              • 9271
                              #8
                              Re: LG 50PC3D Plasma -bad caps or is there more to this?

                              Originally posted by nanosec
                              Any recommended source for rebuild or replacement boards?
                              I have no personal dealings with CoppellTV (or financial gain), but I have been following their blog and they seem like a reputable company. One member reported good dealings with them.

                              Their latest post makes you think about repair or replace.

                              http://blog.coppelltvrepair.com/

                              They also have ebay auctions to repair/replace parts.
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                                Comment

                                • Village Electronics
                                  OldPro
                                  • Apr 2011
                                  • 118
                                  #9
                                  Re: LG 50PC3D Plasma -bad caps or is there more to this?

                                  Originally posted by nanosec
                                  Thanks guys, appreciate your help and please forgive my image faux pas
                                  Any recommended source for rebuild or replacement boards?
                                  I may have that board. Could you post a picture of the buffer? It may be one long board or 2 shorter boards. In an LG they will be on the far left when facing the open rear of the TV.

                                  Get the numbers on the white label. That will be the part number.

                                  The fault in buffers is usually the flat pack IC's. Very difficult to change individually with highly specialized equipment. The parts numbers are easy to search out.

                                    Comment

                                    • nanosec
                                      New Member
                                      • May 2011
                                      • 7
                                      #10
                                      Re: LG 50PC3D Plasma -bad caps or is there more to this?

                                      Sorry for the delay, here's pics of the part numbers for the buffer boards
                                      Attached Files

                                        Comment

                                        • djjuanito2
                                          New Member
                                          • Dec 2010
                                          • 3
                                          #11
                                          LG 50PC3D Plasma -bad caps or is there more to this?

                                          Hello,
                                          Did you guy's found the fix for this problem with the picture?
                                          Thanks!!

                                            Comment

                                            • rmoody
                                              Learning Member
                                              • Jul 2011
                                              • 262
                                              #12
                                              Re: LG 50PC3D Plasma -bad caps or is there more to this?

                                              Originally posted by retiredcaps
                                              I have no personal dealings with CoppellTV (or financial gain), but I have been following their blog and they seem like a reputable company. One member reported good dealings with them.

                                              Their latest post makes you think about repair or replace.

                                              http://blog.coppelltvrepair.com/

                                              They also have ebay auctions to repair/replace parts.
                                              I sent a Ysus to them today to be rebuilt. I hope they do well.

                                                Comment

                                                • djjuanito2
                                                  New Member
                                                  • Dec 2010
                                                  • 3
                                                  #13
                                                  Re: LG 50PC3D Plasma -bad caps or is there more to this?

                                                  I replaced the y-sus ,z-sus and still showing the same picture ,I think maybe is the power supply.

                                                  I hope somebody can find the fix , If I fixed first I will posted.

                                                  Thanks!!

                                                    Comment

                                                    • rayrod81
                                                      Badcaps Veteran
                                                      • Oct 2010
                                                      • 205
                                                      #14
                                                      Re: LG 50PC3D Plasma -bad caps or is there more to this?

                                                      It is a buffer problem not y-sus or z-sus. Replace buffers and it should work fine.

                                                        Comment

                                                        • djjuanito2
                                                          New Member
                                                          • Dec 2010
                                                          • 3
                                                          #15
                                                          Re: LG 50PC3D Plasma -bad caps or is there more to this?

                                                          Thanks my friend ,
                                                          I found the problem it was the 6871QDH089A ON THE 50PC3D -LG /SHORTED FET

                                                          This damage on the power supply the FET SD20N60 Q852 I believe is the location and the Y-sus and z-sus board was bad too.

                                                            Comment

                                                            • rayrod81
                                                              Badcaps Veteran
                                                              • Oct 2010
                                                              • 205
                                                              #16
                                                              Re: LG 50PC3D Plasma -bad caps or is there more to this?

                                                              Yeah the FETs shorting on the buffer are a common problem with this panel.

                                                                Comment

                                                                • cadillacman
                                                                  Badcaps Veteran
                                                                  • Feb 2011
                                                                  • 524
                                                                  #17
                                                                  Re: LG 50PC3D Plasma -bad caps or is there more to this?

                                                                  i had the same issue with a 42 inch lg... one of four shorted, went ahead and replaced them all...

                                                                    Comment

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