LG 50PA5500 stripped...

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  • freakaftr8
    Badcaps Legend
    • Oct 2012
    • 3743
    • USA
    #1

    LG 50PA5500 stripped...

    So i just went and picked up a plasma. this guy is 1080p made in 2012. Preious buyer was informed its not working, but had no idea boards were stripped out of it. So 30 bucks later its on my bench. founds the boards on ebay from a broken screen tv. Almost complete waiting on a y sustain cable to come in. screen looks good and not cracked. Wonder why it was stripped of all boards.. Anyone knowing the reliability and build quality of todays plasmas want to chime in? What do you think im going to find when I power it up?
    Im guessing vertical lines or an ic completely blown out...

    Hmmm.. Diggin the suspence. lol
    Last edited by freakaftr8; 12-18-2013, 04:44 PM.
    Did I leave the soldering iron on?
    Tags: None
    • newtothis
      Badcaps Legend
      • Mar 2013
      • 1556
      • england
      #2
      Re: LG 50PA5500 stripped...

      i bought a stripped set not long ago, LCD seemed intact but there where no boards in it... £5!

      It was vestel internals which I have plenty of here, so put them in expecting a panel fault.... yes there was a panel fault.. A dead pixel! LOL

      Seemed previous owner just stripped the rest of the boards out when one went bad and sold them... Crazy really as the panel is worth more!

      Hope its good news for you

        Comment

        • tom66
          EVs Rule
          • Apr 2011
          • 32560
          • UK
          #3
          Re: LG 50PA5500 stripped...

          These have tons of issues with LVDS cable and are only 2012 TVs it's bloody crazy!
          Just fixed a 32" Smart LED with an LVDS fault
          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

            • freakaftr8
              Badcaps Legend
              • Oct 2012
              • 3743
              • USA
              #4
              Re: LG 50PA5500 stripped...

              Originally posted by newtothis
              i bought a stripped set not long ago, LCD seemed intact but there where no boards in it... £5!

              It was vestel internals which I have plenty of here, so put them in expecting a panel fault.... yes there was a panel fault.. A dead pixel! LOL

              Seemed previous owner just stripped the rest of the boards out when one went bad and sold them... Crazy really as the panel is worth more!

              Hope its good news for you
              Thats always a happy ending
              Did I leave the soldering iron on?

                Comment

                • freakaftr8
                  Badcaps Legend
                  • Oct 2012
                  • 3743
                  • USA
                  #5
                  Re: LG 50PA5500 stripped...

                  Well the cables finally showed up along with all the replacement boards, hey at 80 dollars plus 30 for the tv, I was taking a risk...

                  Well heres the outcome, it is a defective panel, but not as bad as I thouht it could be...

                  http://i845.photobucket.com/albums/a...ps52098d0f.jpg


                  http://i845.photobucket.com/albums/a...ps76414dc9.jpg


                  Two horizontal lines dropped out on the top of the screen...

                  Lol I thought only Samsung was having this problem.
                  Last edited by freakaftr8; 01-03-2014, 01:01 PM.
                  Did I leave the soldering iron on?

                    Comment

                    • tom66
                      EVs Rule
                      • Apr 2011
                      • 32560
                      • UK
                      #6
                      Re: LG 50PA5500 stripped...

                      Right at the top? That's a liveable fault... Crazy that a panel that new died so early...
                      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

                        • freakaftr8
                          Badcaps Legend
                          • Oct 2012
                          • 3743
                          • USA
                          #7
                          Re: LG 50PA5500 stripped...

                          this is odd the TV was running for about 5 minutes with the patterns because I have the jumper enabled on the control board however I am still missing the main ribbon that goes between the control board and the mainboard the TV shut itself off I'm assuming it's a no signal and now when I power it back up there is no picture at all. Does it require the ribbon cable connected between the two boards to re enable something am I missing something? Almost as if even though I can hear the sustains running there's still no picture is completely black.
                          Did I leave the soldering iron on?

                            Comment

                            • tom66
                              EVs Rule
                              • Apr 2011
                              • 32560
                              • UK
                              #8
                              Re: LG 50PA5500 stripped...

                              Could be that the test pattern jumper is not in place fully?
                              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

                                • freakaftr8
                                  Badcaps Legend
                                  • Oct 2012
                                  • 3743
                                  • USA
                                  #9
                                  Re: LG 50PA5500 stripped...

                                  I thought that so I soldered it in place. Same thing.
                                  Did I leave the soldering iron on?

                                    Comment

                                    • tom66
                                      EVs Rule
                                      • Apr 2011
                                      • 32560
                                      • UK
                                      #10
                                      Re: LG 50PA5500 stripped...

                                      Odd. I don't know, check things like Vs, Va, -Vy, Vsc. Check 5V on control board, check PSU working.
                                      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

                                        • freakaftr8
                                          Badcaps Legend
                                          • Oct 2012
                                          • 3743
                                          • USA
                                          #11
                                          Re: LG 50PA5500 stripped...

                                          Ok. The top buffer ic where the dead lines were is shorted. Hmm either the panel took out the IC or the IC was bad and finally failed. Your thoughts? The boards did come from a cracked screen TV.
                                          Did I leave the soldering iron on?

                                            Comment

                                            • tom66
                                              EVs Rule
                                              • Apr 2011
                                              • 32560
                                              • UK
                                              #12
                                              Re: LG 50PA5500 stripped...

                                              Ah, if you got boards from a cracked panel I reckon your buffer was bad... you need to be real careful with those boards... the panel might be OK and bad buffer board cause that fault. Where did you buy buffer from?
                                              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

                                                • freakaftr8
                                                  Badcaps Legend
                                                  • Oct 2012
                                                  • 3743
                                                  • USA
                                                  #13
                                                  Re: LG 50PA5500 stripped...

                                                  Fleabay
                                                  Did I leave the soldering iron on?

                                                    Comment

                                                    • tom66
                                                      EVs Rule
                                                      • Apr 2011
                                                      • 32560
                                                      • UK
                                                      #14
                                                      Re: LG 50PA5500 stripped...

                                                      Ugh, so no chance of any testing being done. Before you install new board, test as such:
                                                      http://www.youtube.com/watch?v=51SZsfH60EY
                                                      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

                                                        • freakaftr8
                                                          Badcaps Legend
                                                          • Oct 2012
                                                          • 3743
                                                          • USA
                                                          #15
                                                          Re: LG 50PA5500 stripped...

                                                          I know I should have known better I was in kind of a hurry this morning usually when I buy a buffer board on ebay if I don't just repair the board myself With a replacement IC I usually ohm the board to the output to see if there are shorts on this one however it's possible that that Ic was damaged but not so and then under use it probably got too hot and shorted
                                                          Did I leave the soldering iron on?

                                                            Comment

                                                            • tom66
                                                              EVs Rule
                                                              • Apr 2011
                                                              • 32560
                                                              • UK
                                                              #16
                                                              Re: LG 50PA5500 stripped...

                                                              This could mean that line wasn't really a fault with the panel but with the buffer board.
                                                              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

                                                                • freakaftr8
                                                                  Badcaps Legend
                                                                  • Oct 2012
                                                                  • 3743
                                                                  • USA
                                                                  #17
                                                                  Re: LG 50PA5500 stripped...

                                                                  Yes. Crossing my fingers. I have heard before of panel failure like that causing a buffer ic to short. That's what I'm worried about. I keep thinking of the back of my head that that unit was stripped of all boards for some reason

                                                                  oddly I can't seem to find that IC anywhere
                                                                  Did I leave the soldering iron on?

                                                                    Comment

                                                                    • tom66
                                                                      EVs Rule
                                                                      • Apr 2011
                                                                      • 32560
                                                                      • UK
                                                                      #18
                                                                      Re: LG 50PA5500 stripped...

                                                                      You could swap two buffer chips around to confirm the theory before ordering more parts.
                                                                      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

                                                                        • freakaftr8
                                                                          Badcaps Legend
                                                                          • Oct 2012
                                                                          • 3743
                                                                          • USA
                                                                          #19
                                                                          Re: LG 50PA5500 stripped...

                                                                          Have any idea where to get r2a20299ft 151106 buffer ic? Is there an equivalent?
                                                                          Did I leave the soldering iron on?

                                                                            Comment

                                                                            • tom66
                                                                              EVs Rule
                                                                              • Apr 2011
                                                                              • 32560
                                                                              • UK
                                                                              #20
                                                                              Re: LG 50PA5500 stripped...

                                                                              Another buffer board?
                                                                              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

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