LG 50PC55 Plasma–multiple attempts to turn on; but now no image... help

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  • freakaftr8
    Badcaps Legend
    • Oct 2012
    • 3743
    • USA

    #21
    Re: LG 50PC55 Plasma–multiple attempts to turn on; but now no image... help

    If I'm not mistaken this TVs Vizio variant has capacitor problems on the power supply that prevents it from starting up properly. If I remember there's like 5 or 6 of them that need replacing. It's been a few years that I had one come into me but this is why I remember
    Did I leave the soldering iron on?

    Comment

    • mojo7676
      Mojo7676
      • Nov 2015
      • 19
      • uk

      #22
      Re: LG 50PC55 Plasma–multiple attempts to turn on; but now no image... help

      update - sorry for the delay...

      so heated the board as shown in the pictures and when i got to the two black rectangular blocks (white block above it, and a blue one above the white one), the tv turned on.

      Now, i'm assuming it's one or both of these blocks which are a bit dud. Of course, it could also be the case that the heat diffused and heated up another otherwise dud part... I didn't have the presence of mind to check out the black capacitors on the left hand side of the board but might do that tomorrow just in case. So anyway, given that i'm still not sure, the question is, is it possible to source replacement bits on their own and if so, where from? Also, I've no idea how to identify/name them in order to buy them and then, on top of that, am not sure how much of a complex/detailed job it is in terms of removing and replacing offending components. I have soldered in the past but anything more complex than that might be challenging.

      The alternative is to switch out the whole board but that might have the same fault. There are various part numbers on the board including EAX32412301 EAY32957901. I've seen a couple of ebay uk -

      http://www.ebay.co.uk/itm/POWER-BOAR...EAAOSwQPlV9HqU

      and

      http://www.ebay.co.uk/itm/LG-EAX3241...IAAOSwAYtWOL~j

      so that's where i'm at right now.
      Attached Files

      Comment

      • ReeceyBurger123
        Never Give Up !
        • May 2014
        • 7325
        • Britain

        #23
        Re: LG 50PC55 Plasma–multiple attempts to turn on; but now no image... help

        Ignore this post.
        Last edited by ReeceyBurger123; 11-04-2015, 01:10 PM.
        Please Do Not PM My Page Asking For Help Badcaps Is The Place For Advise, Page Linked For Business Reasons Only. Anyone Doing So Will Be Banned Instantly !

        https://www.facebook.com/Telford-Tel...7894576335359/

        Comment

        • jose6326
          Badcaps Veteran
          • May 2013
          • 707
          • USA

          #24
          Re: LG 50PC55 Plasma–multiple attempts to turn on; but now no image... help

          i see a few bulged/leaking caps

          i circled the ones in red that are bulged
          but i would replace all of the ones i circled

          the one i circled in green im not sure if that is a cap or not

          if it is i would replace it as well


          this is really a low cost repair
          Attached Files
          Last edited by jose6326; 11-04-2015, 01:10 PM.

          Comment

          • ReeceyBurger123
            Never Give Up !
            • May 2014
            • 7325
            • Britain

            #25
            Re: LG 50PC55 Plasma–multiple attempts to turn on; but now no image... help

            Dang it I should have opened the images ! See the attachment I upload thats your fault right there !
            Attached Files
            Please Do Not PM My Page Asking For Help Badcaps Is The Place For Advise, Page Linked For Business Reasons Only. Anyone Doing So Will Be Banned Instantly !

            https://www.facebook.com/Telford-Tel...7894576335359/

            Comment

            • ReeceyBurger123
              Never Give Up !
              • May 2014
              • 7325
              • Britain

              #26
              Re: LG 50PC55 Plasma–multiple attempts to turn on; but now no image... help

              You need to replace those capacitors and your tv should be fixed. What are their values ?
              Please Do Not PM My Page Asking For Help Badcaps Is The Place For Advise, Page Linked For Business Reasons Only. Anyone Doing So Will Be Banned Instantly !

              https://www.facebook.com/Telford-Tel...7894576335359/

              Comment

              • jose6326
                Badcaps Veteran
                • May 2013
                • 707
                • USA

                #27
                Re: LG 50PC55 Plasma–multiple attempts to turn on; but now no image... help

                this kit should fix your problem

                i normally purchase from digikey but i dont know if they ship to your neck of the woods

                http://www.ebay.com/itm/LG-50PC55-PO...vzWyvvga0Mfvpg

                Comment

                • mojo7676
                  Mojo7676
                  • Nov 2015
                  • 19
                  • uk

                  #28
                  Re: LG 50PC55 Plasma–multiple attempts to turn on; but now no image... help

                  Sorry for thedelay. Received the part ordered through asleep on eBay. Looks suspiciously straightforward..l will try tomorrow to swap out capacitors and report back. Thanks again to all.

                  Comment

                  • mojo7676
                    Mojo7676
                    • Nov 2015
                    • 19
                    • uk

                    #29
                    Re: LG 50PC55 Plasma–multiple attempts to turn on; but now no image... help

                    "A seller" not "asleep"... Autocorrect

                    Comment

                    • mojo7676
                      Mojo7676
                      • Nov 2015
                      • 19
                      • uk

                      #30
                      Re: LG 50PC55 Plasma–multiple attempts to turn on; but now no image... help

                      update: good news... bad news... good news... bad news.... good/weird news

                      good news: replaced the caps as instructed. seemed straight forward enough

                      bad news: forgot one screw on the board.

                      good news: the tv worked.

                      bad news: 10 minutes later, 3 very loud pops (and much hysterical screaming from the direction of my wife and our 2 daughters) - a second between each pop, maybe. tv switched itself off but red light still on.

                      good/weird news: hit the power button the remote... and the tv came back on. it's been on for about 15 minutes now, no pops or anything.

                      so: any ideas? i imagine the worse thing can happen, if left running as is, is for the whole tv to become knackered completely. am going to switch it off but leave it running for a while tomorrow and see what happens. if you think this is dangerous, let me know.

                      thanks again for all the advice.

                      Comment

                      • vinceroger69
                        Badcaps Legend
                        • Mar 2012
                        • 6714
                        • uk

                        #31
                        Re: LG 50PC55 Plasma–multiple attempts to turn on; but now no image... help

                        maybe as you have replaced the capacitors there maybe a little too much flux left on the board if you did not clean if afterwards, some solder ive noticed leaves a lot and maybe the flux allowed it to ark over the tracks hence the popping noise maybe worth a check.

                        Comment

                        • jose6326
                          Badcaps Veteran
                          • May 2013
                          • 707
                          • USA

                          #32
                          Re: LG 50PC55 Plasma–multiple attempts to turn on; but now no image... help

                          i would remove the back cover again and check the caps

                          did you replace the new caps in the correct through holes?
                          meaning you might have reversed the polarities

                          Comment

                          • mojo7676
                            Mojo7676
                            • Nov 2015
                            • 19
                            • uk

                            #33
                            Re: LG 50PC55 Plasma–multiple attempts to turn on; but now no image... help

                            well, tbh, didn't even think about polarity (rank amateur, i know... appalling!) but... it's been fine since. if it is an issue, i guess i'll find out in due course... anyway, thanks again to all - especially reeceyburger and jose for being so helpful throughout.

                            Comment

                            • vinceroger69
                              Badcaps Legend
                              • Mar 2012
                              • 6714
                              • uk

                              #34
                              Re: LG 50PC55 Plasma–multiple attempts to turn on; but now no image... help

                              maybe worth taking the back of and checking the polarity of the capacitors as it could/maybe be a fire hazard i guess.

                              Comment

                              • mojo7676
                                Mojo7676
                                • Nov 2015
                                • 19
                                • uk

                                #35
                                Re: LG 50PC55 Plasma–multiple attempts to turn on; but now no image... help

                                okay will do - didn't realise the dashes on one side were indicators of polarity. thanks again

                                Comment

                                • vinceroger69
                                  Badcaps Legend
                                  • Mar 2012
                                  • 6714
                                  • uk

                                  #36
                                  Re: LG 50PC55 Plasma–multiple attempts to turn on; but now no image... help

                                  yes thats the negative side of the capacitor theres usually a marking of some kind on the circuit board too look at one of the capacitors you have not changed you should see what i mean

                                  Comment

                                  • mojo7676
                                    Mojo7676
                                    • Nov 2015
                                    • 19
                                    • uk

                                    #37
                                    Re: LG 50PC55 Plasma–multiple attempts to turn on; but now no image... help

                                    sorry for the delay -

                                    anyway, another minor/uneventful update...

                                    the tv seems to be still working fine. go figure. again, thanks to all

                                    all best wishes for the new year

                                    Comment

                                    • ReeceyBurger123
                                      Never Give Up !
                                      • May 2014
                                      • 7325
                                      • Britain

                                      #38
                                      Re: LG 50PC55 Plasma–multiple attempts to turn on; but now no image... help

                                      I would suggest you check it asap ! You could have an arching issue (due to lose screw) or something else which could damage the tv even further.
                                      Please Do Not PM My Page Asking For Help Badcaps Is The Place For Advise, Page Linked For Business Reasons Only. Anyone Doing So Will Be Banned Instantly !

                                      https://www.facebook.com/Telford-Tel...7894576335359/

                                      Comment

                                      • mojo7676
                                        Mojo7676
                                        • Nov 2015
                                        • 19
                                        • uk

                                        #39
                                        Re: LG 50PC55 Plasma–multiple attempts to turn on; but now no image... help

                                        okay - i did that today and couldn't really see anything loose or crappy in terms of excess solder. i didn't go as far as taking out the caps to see if they were in the right way round. put it back together and it still seems to be ok. thanks again, reeceyburger

                                        Comment

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