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Proscan PLED5529A Troubleshooting

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    Proscan PLED5529A Troubleshooting

    All the part numbers are the same as Haier LE55B1381

    I'll tell the whole story including stuff that might not be necessary!

    I bought this TV 2 years ago and it arrived damaged in shipment. There were some discolorations on the screen and the coaxial jack was ripped out. I filed a claim with FedEx and got to keep the TV. I figured it was still usable with these issues.

    A year later, it wouldnt power on. I opened it up and replaced the filter caps in the power supply, and from then on it worked fine.

    Interestingly, after opening it, recapping, and putting it back together again, all the discolorations on the screen went away.

    Also, I decided to rectify my biggest complaint with the unit and connected the speaker leads to a set of bookshelf speakers instead of the internal speakers. This improved the sound tremendously.

    Now, a year later, it wouldnt turn on again. This time rather than recap, I replaced the entire power supply board.

    It turns on but there is no longer any sound through the speakers. There is still sound through the headphone jack.

    Also, up until now I could still pick up some local digital channels with nothing connected to the broken coax jack. Now, nothing.

    I was going to order a replacement for the board the speakers plugged into-- I assumed it was an amplifier board-- but another thread on this forum says it's a TCON board.

    Also the coax jack appears to be part of the main board, I'm wondering if the best thing to do would be to replace that entire board? I dont NEED coax or even local channels but it is useful.

    I will post some pictures, they arent very good.

    #2
    Re: Proscan PLED5529A Troubleshooting

    Overview
    Attached Files

    Comment


      #3
      Re: Proscan PLED5529A Troubleshooting

      Replaced power supply
      Attached Files

      Comment


        #4
        Re: Proscan PLED5529A Troubleshooting

        Been trying to figure out what these blue leads go to
        Attached Files

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          #5
          Re: Proscan PLED5529A Troubleshooting

          The "amplifier board" and the adjacent board.
          Attached Files

          Comment


            #6
            Re: Proscan PLED5529A Troubleshooting

            The TCON (Timing Control) board is only for the LCD. Has nothing to do with the sound or picking up channels. On your last picture the board in the bottom right corner is your main board. That's where the trouble lies and the board you need. The leads that disappear deliver the power to the backlights behind the LCD panel.

            Now if your symptoms are the result by replacing the power supply, we would have to do some diagnosing first, before throwing parts at it. Post a nice straight shot, high res. picture of the main board, so we can see something.

            Comment


              #7
              Re: Proscan PLED5529A Troubleshooting

              How's this?
              Attached Files

              Comment


                #8
                Re: Proscan PLED5529A Troubleshooting

                Try heating up the main board with a hair dryer and see what you get.

                Comment


                  #9
                  Re: Proscan PLED5529A Troubleshooting

                  Originally posted by dspiffy View Post
                  The "amplifier board" and the adjacent board.
                  That is FRC (Frame Rate Coversion) PCBA.
                  Never stop learning
                  Basic LCD TV and Monitor troubleshooting guides.
                  http://www.badcaps.net/forum/showthr...956#post305956

                  Voltage Regulator (LDO) testing:
                  http://www.badcaps.net/forum/showthr...999#post300999

                  Inverter testing using old CFL:
                  http://www.badcaps.net/forum/showthr...er+testing+cfl

                  Tear down pictures : Hit the ">" Show Albums and stories" on the left side
                  http://s807.photobucket.com/user/budm/library/

                  TV Factory reset codes listing:
                  http://www.badcaps.net/forum/showthread.php?t=24809

                  Comment


                    #10
                    Re: Proscan PLED5529A Troubleshooting

                    Originally posted by CapLeaker View Post
                    Try heating up the main board with a hair dryer and see what you get.
                    For reflow? I've heard of this being suggested, but I've never heard of it actually working.

                    Comment


                      #11
                      Re: Proscan PLED5529A Troubleshooting

                      For heating up the caps and may be cold solder joints, bad parts with heat sensitive, not for reflow.
                      Never stop learning
                      Basic LCD TV and Monitor troubleshooting guides.
                      http://www.badcaps.net/forum/showthr...956#post305956

                      Voltage Regulator (LDO) testing:
                      http://www.badcaps.net/forum/showthr...999#post300999

                      Inverter testing using old CFL:
                      http://www.badcaps.net/forum/showthr...er+testing+cfl

                      Tear down pictures : Hit the ">" Show Albums and stories" on the left side
                      http://s807.photobucket.com/user/budm/library/

                      TV Factory reset codes listing:
                      http://www.badcaps.net/forum/showthread.php?t=24809

                      Comment


                        #12
                        Re: Proscan PLED5529A Troubleshooting

                        I can certainly give it a try. Surely someone I know has a hair dryer I can borrow.

                        Comment


                          #13
                          Re: Proscan PLED5529A Troubleshooting

                          Originally posted by budm View Post
                          For heating up the caps and may be cold solder joints, bad parts with heat sensitive, not for reflow.
                          that's where I was going with it.

                          Comment


                            #14
                            Re: Proscan PLED5529A Troubleshooting

                            Or if that fails, freeze spray the Spi flash Ic (normally U11 on them boards but not certain) sometimes the Ic corrupts meaning it wont load the firmware and makes the Tv stuck in standby. Freezing it allows it to read the files again and boot in alot of cases, if so you know your firmware has gone.
                            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


                              #15
                              Re: Proscan PLED5529A Troubleshooting

                              The TV works fine except for the sound and coax input. It is not stuck in standby.

                              Comment


                                #16
                                Re: Proscan PLED5529A Troubleshooting

                                Heated the main board with a hair dryer and reseated all the molex connectors. Now I have sound. The tuner does not work unless I stick a screwdriver where the broken coax jack was. Is there a way to replace only that part of the board, or is my only option to replace the entire main board?

                                Comment


                                  #17
                                  Re: Proscan PLED5529A Troubleshooting

                                  If you find the proper connector, no problem. Maybe check Digikey or Mouser etc.

                                  Comment


                                    #18
                                    Re: Proscan PLED5529A Troubleshooting

                                    It's more than just the coax jack, it's broken off inside the shielded case. I assume I'd have to replace whatever is inside the shielded case.

                                    Comment


                                      #19
                                      Re: Proscan PLED5529A Troubleshooting

                                      pictures?

                                      Comment


                                        #20
                                        Re: Proscan PLED5529A Troubleshooting

                                        Here's the best picture I can get.
                                        Attached Files

                                        Comment

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