Faulty lg 50pg3000

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  • tom66
    EVs Rule
    • Apr 2011
    • 32560
    • UK

    #21
    Re: Faulty lg 50pg3000

    OK, place the red probe on the copper area marked in red. Then run the black probe along the ribbon connector contacts. Try not to miss any.

    Your meter should be on the beep mode - i.e. when you touch the probes together it should beep.

    You only need to do this on the upper buffer board. The lower is OK.
    Attached Files
    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

    • scootmansfield
      Member
      • Jul 2014
      • 28
      • UK

      #22
      Re: Faulty lg 50pg3000

      Originally posted by tom66
      OK, place the red probe on the copper area marked in red. Then run the black probe along the ribbon connector contacts. Try not to miss any.

      Your meter should be on the beep mode - i.e. when you touch the probes together it should beep.

      You only need to do this on the upper buffer board. The lower is OK.
      So am I looking for continuity across all contacts?

      Comment

      • tom66
        EVs Rule
        • Apr 2011
        • 32560
        • UK

        #23
        Re: Faulty lg 50pg3000

        You should get no continuity.
        I am fairly sure your top buffer is bad, but this is additional information which will confirm it.
        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

        • scootmansfield
          Member
          • Jul 2014
          • 28
          • UK

          #24
          Re: Faulty lg 50pg3000

          Originally posted by tom66
          You should get no continuity.
          I am fairly sure your top buffer is bad, but this is additional information which will confirm it.
          On the left set of terminals there was no continuity but some terminals when tested gave a 1 on my multimeter and some gave varying numbers 476 589 etc.

          Comment

          • tom66
            EVs Rule
            • Apr 2011
            • 32560
            • UK

            #25
            Re: Faulty lg 50pg3000

            OK, that is a bad board. They are not dead short but they are leaky. So I would say you can just go and replace the top buffer board to fix this problem.
            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

            • scootmansfield
              Member
              • Jul 2014
              • 28
              • UK

              #26
              Re: Faulty lg 50pg3000

              Middle ribbon connector contacts all gave varying numbered readings and not one 1 reading

              Comment

              • scootmansfield
                Member
                • Jul 2014
                • 28
                • UK

                #27
                Re: Faulty lg 50pg3000

                The left hand ribbon connector is right where the lines are horizontally on the TV as well does that make sense?

                Comment

                • tom66
                  EVs Rule
                  • Apr 2011
                  • 32560
                  • UK

                  #28
                  Re: Faulty lg 50pg3000

                  Can you try reversing the red and black probes and do the test again?
                  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

                  • scootmansfield
                    Member
                    • Jul 2014
                    • 28
                    • UK

                    #29
                    Re: Faulty lg 50pg3000

                    Originally posted by tom66
                    Can you try reversing the red and black probes and do the test again?
                    Just a constant 1 when I do that

                    Comment

                    • tom66
                      EVs Rule
                      • Apr 2011
                      • 32560
                      • UK

                      #30
                      Re: Faulty lg 50pg3000

                      Hm, no shorts. Well, I would say replace the board anyway, given the fault symptoms. I can't see any other part causing it. Wish I could be more conclusive, though.
                      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

                      • scootmansfield
                        Member
                        • Jul 2014
                        • 28
                        • UK

                        #31
                        Re: Faulty lg 50pg3000

                        Ok Thank you

                        Where is the best place to buy one from?

                        Any ideas?

                        Thanks

                        Comment

                        • tom66
                          EVs Rule
                          • Apr 2011
                          • 32560
                          • UK

                          #32
                          Re: Faulty lg 50pg3000

                          eBay, FlatTVParts, RecyclingLives, ...
                          There are many, but getting the part may be tricky.
                          There is an LG distributor selling a new part for about £70 all in.
                          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

                          • scootmansfield
                            Member
                            • Jul 2014
                            • 28
                            • UK

                            #33
                            Re: Faulty lg 50pg3000

                            Originally posted by tom66
                            eBay, FlatTVParts, RecyclingLives, ...
                            There are many, but getting the part may be tricky.
                            There is an LG distributor selling a new part for about £70 all in.
                            Where is the new part 70 quid is ok? I will buy today

                            Comment

                            • scootmansfield
                              Member
                              • Jul 2014
                              • 28
                              • UK

                              #34
                              Re: Faulty lg 50pg3000

                              Recyclinglives coming up bad domain

                              Comment

                              • tom66
                                EVs Rule
                                • Apr 2011
                                • 32560
                                • UK

                                #35
                                Re: Faulty lg 50pg3000

                                Just search for your EBR number printed on the sticker.
                                e.g. EBR123456789
                                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

                                • scootmansfield
                                  Member
                                  • Jul 2014
                                  • 28
                                  • UK

                                  #36
                                  Re: Faulty lg 50pg3000

                                  Hi Tom is an EBR50039008 the same as my EBR50039005?

                                  Been offered one on ebay

                                  http://cgi.ebay.co.uk/ws/eBayISAPI.d...:X:RTQ:GB:1123

                                  Comment

                                  • sordids999
                                    Badcaps Legend
                                    • May 2013
                                    • 2149
                                    • uk

                                    #37
                                    Re: Faulty lg 50pg3000

                                    Be careful the guy who's listing that tv has a cracked screen which sometimes shorts the buffers etc I've learnt my lesson buying cracked screened tvs

                                    Comment

                                    • tom66
                                      EVs Rule
                                      • Apr 2011
                                      • 32560
                                      • UK

                                      #38
                                      Re: Faulty lg 50pg3000

                                      If the Y-sustain and control board have the same part numbers it should work OK.
                                      Sordids is correct it can cause issues though I am not aware of it affecting LG, only Samsung and Panasonic, you will be taking a risk...
                                      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

                                      • scootmansfield
                                        Member
                                        • Jul 2014
                                        • 28
                                        • UK

                                        #39
                                        Re: Faulty lg 50pg3000

                                        Just to let you know TOM that part I purchased from Ebay worked fine!

                                        Many thanks for your expert advice

                                        Comment

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