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Lg 60pa6500 black spots on tv

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    #21
    Re: Lg 60pa6500 black spots on tv

    Thanks I used my multimeter I get weird readings on q302 , q202, and another one , is there something else I should test ? I know I should change those ones
    Thanks
    Attached Files

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      #22
      Re: Lg 60pa6500 black spots on tv

      What are those weird readings?

      Anything below 500 ohms is a problem.

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        #23
        Re: Lg 60pa6500 black spots on tv

        There low and fluctuating alot compared to the others around 200 and fluctuates
        Q302 auk b2c25 smk0825
        Q282 auk b2c25 smk0825
        Q281auk b2c25 smk0825
        Where do I find them? And the other types on this are
        Rkp30h2a 4p 026 and auk b3103 sf200400sd2
        Thanks

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          #24
          Re: Lg 60pa6500 black spots on tv

          You got some part numbers wrong. For q302, q281 and q282 is SMK0825, an IGBT.

          RJP30H2A is an IGBT, nothing comes up with RKP30.

          SF20D400SD2 is a diode.

          If they are suspect of being shorted, then they have be desoldered from the board and tested off-circuit.

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            #25
            Re: Lg 60pa6500 black spots on tv

            Heres pics of the 3 different components and the writing on them . Where can I get these? Thanks also is there something else i should check?
            Thanks
            Attached Files

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              #26
              Re: Lg 60pa6500 black spots on tv

              You can check SF20D400SD2 as Biruslapio says since they are dual diode pack which your meter can test. Unfortunately the best way to test them is if they test short on the board to desolder them and test again.
              Attached Files
              Willing to help but I'm no expert.

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                #27
                Re: Lg 60pa6500 black spots on tv

                Thanks if I desolder it I'm just going to change all of them as theres only a few, with new ones, where can I find these ? Do I just search for smk0825 , RJP30H2A and SF20D400SD2 ?

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                  #28
                  Re: Lg 60pa6500 black spots on tv

                  you can just desolder the legs and lift them up a bit .

                  Comment


                    #29
                    Re: Lg 60pa6500 black spots on tv

                    Originally posted by pansatdishman View Post
                    Here's the z sustain board , does it look like theres anything wrong thanks in advance
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                      #30
                      Re: Lg 60pa6500 black spots on tv

                      Okay so I was able to find a parts tv. Bit I'd like to fix both. So I know what's wrong g with the one I got today the main board had the hdmi component ripped off. I tried swapping a sustain boards and it did the exact same thing. So it's not the z sustain, power supply or?

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                        #31
                        Re: Lg 60pa6500 black spots on tv

                        Test the buffer boards for short-circuit on the output pins.
                        It takes some seconds for the screen to fully recover from these black spots when the sustain issue is solved.

                        The other tv you bought works fine except for the HDMI?
                        Last edited by Biruslapio; 08-30-2021, 03:36 AM.

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                          #32
                          Re: Lg 60pa6500 black spots on tv

                          Okay so I swapped all the boards the issue for the black hazr was the y sustain board. The tv I bought yesterday all that's wrong with it is the hdmi port was broke off the tv so the tv wont power on. So right now I have a working tv, and a y sustain board and a main board with the hdmi port broke off

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                            #33
                            Re: Lg 60pa6500 black spots on tv

                            Heres the y sustain board, this looks like the issue causing the black haze?
                            Attached Files

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                              #34
                              Re: Lg 60pa6500 black spots on tv

                              Heres the control board with the broke off hdmi board with this board the tv wont power on
                              Attached Files

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                                #35
                                Re: Lg 60pa6500 black spots on tv

                                Originally posted by pansatdishman View Post
                                Heres the y sustain board, this looks like the issue causing the black haze?
                                I woundn't have guessed it just by the photos, certainly looked like a Z-SUS fault.

                                I see no problems in the picture, only that it has a dot that has been resoldered, that brown stuff is flux, either at the factory or someone else touched only that spot.

                                If you want to fix the Y sustain follow the same procedures that I pointed at #16 and measure the main voltages it produces, -VY and VSC.

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                                  #36
                                  Re: Lg 60pa6500 black spots on tv

                                  For the main board should I just get another hdmi port and which one am I looking for thanks

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                                    #37
                                    Re: Lg 60pa6500 black spots on tv

                                    If you see any shorts where the hdmi port came off run your iron over them to remove them. The board will still work fine without the port there provided the cpu isn't seeing a short.

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                                      #38
                                      Re: Lg 60pa6500 black spots on tv

                                      Yeah the board isn't working without the hdmi, and I see the board is missing one trace for it

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                                        #39
                                        Re: Lg 60pa6500 black spots on tv

                                        The main board should work with the hdmi port removed can you upload a picture of the missing trace area

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                                          #40
                                          Re: Lg 60pa6500 black spots on tv

                                          Here
                                          Attached Files

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