Samsung UN40EH5000F shutting down randomly I might have repaired time will tell

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  • sam_sam_sam
    Badcaps Legend
    • Jul 2011
    • 6062
    • USA
    #1

    Samsung UN40EH5000F shutting down randomly I might have repaired time will tell

    My son friend has this tv and the issue with is it turns off randomly for no reason ( this is what was reported to me about what the issue is )

    Well I took off the back cover removed the switching power supply board and checked all of the 47uf@50 volt capacitor they all seem to have an ESR value of 0.24 and a new one has a value of 0.47 which to seem odd that all have values less than a new one has i replaced all four of them

    But this is not all I found

    First —>one of the switching power supply transformer pins had flux all over one of the pins so I heated it and even more flux came out of the soldering joint

    But this was not the only thing I found

    Second—>Two of power diodes all the pins had flux residue all over them and the same thing with these soldering joints more flux coming out from the soldering joints

    Really product quality control are real shit

    So far it has been running for about an hour now so let see what happens next
    Last edited by SMDFlea; 11-21-2021, 06:53 AM. Reason: UN40EH5000F
    Tags: None
    • CapLeaker
      Leaking Member
      • Dec 2014
      • 8325
      • Canada
      #2
      Re: Samsung LCD tv shutting down randomly I might have repaired time will tell me tru

      Sounds similar to one of my nt5b01 repairs. Only way to fix it was to take the inductor out clean the hole and resolder plus clean.

        Comment

        • sam_sam_sam
          Badcaps Legend
          • Jul 2011
          • 6062
          • USA
          #3
          Re: Samsung LCD tv shutting down randomly I might have repaired time will tell me tru

          I ran it for 8 hours and it stayed on until I shut it off to come to work

          I run it again when I get back home until I have to go to work
          Last edited by sam_sam_sam; 11-15-2021, 01:22 AM.

            Comment

            • Davi.p
              Hobbist Tech
              • Sep 2009
              • 4456
              • Italy - Milan
              #4
              Re: Samsung LCD tv shutting down randomly I might have repaired time will tell me tru

              the discussion is useless without tv model.

                Comment

                • sam_sam_sam
                  Badcaps Legend
                  • Jul 2011
                  • 6062
                  • USA
                  #5
                  Re: Samsung LCD tv shutting down randomly I might have repaired time will tell me tru

                  Originally posted by Davi.p
                  the discussion is useless without tv model.
                  This will be coming shortly tv model number

                  Because I have the TV set laying flat on the dining room table the cover is not screwed back together yet this is the reason I have not posted this information yet ( the stand is part of the cover on this TV set )

                  An update

                  This TV set has been running for two different days for over 8 hours each time and so far has not shut down

                  So as far as I am concerned the issue has been resolved

                  I will take some pictures of both sides the board in question and point to each of the issues that I found these pictures are after it was repaired unfortunately I did not take pictures of it before I started the repairs because I was not completely aware of all of the issue with this TV set when my son first brought it home to me to look at it
                  Last edited by sam_sam_sam; 11-15-2021, 07:08 PM.

                    Comment

                    • CapLeaker
                      Leaking Member
                      • Dec 2014
                      • 8325
                      • Canada
                      #6
                      Re: Samsung LCD tv shutting down randomly I might have repaired time will tell me tru

                      Perfect! I’d say case closed!

                        Comment

                        • sam_sam_sam
                          Badcaps Legend
                          • Jul 2011
                          • 6062
                          • USA
                          #7
                          Re: Samsung LCD tv shutting down randomly I might have repaired time will tell me tru

                          Originally posted by Davi.p
                          the discussion is useless without tv model.
                          Here is the information that you requested
                          Attached Files
                          Last edited by sam_sam_sam; 11-19-2021, 08:54 AM.

                            Comment

                            • sam_sam_sam
                              Badcaps Legend
                              • Jul 2011
                              • 6062
                              • USA
                              #8
                              Re: Samsung LCD tv shutting down randomly I might have repaired time will tell me tru

                              Here are some pictures of this switching power supply board section of this tv

                              It still has a good picture on the screen forensics files on Pluto TV channel internet streaming

                              I have also ran it for over 24 hours in one session so it seems to be fixed correctly

                              One note the other capacitors were not replaced because they seem to within reason for there ESR value for the UF value of the capacitor in question plus I did not have those capacitors in my stock pile on hand
                              Attached Files
                              Last edited by sam_sam_sam; 11-19-2021, 09:13 AM.

                                Comment

                                • Davi.p
                                  Hobbist Tech
                                  • Sep 2009
                                  • 4456
                                  • Italy - Milan
                                  #9
                                  Re: Samsung LCD tv shutting down randomly I might have repaired time will tell me tru

                                  removed
                                  Last edited by Davi.p; 11-19-2021, 09:31 AM.

                                    Comment

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