Sony KLV-37S400A Weird Issues

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  • Kyleadonis
    Member
    • Oct 2020
    • 17
    • South Africa
    #1

    Sony KLV-37S400A Weird Issues

    I have a Sony TV that after a few minutes it makes a pop sound through the speakers and then completely switches off and then powers back on by itself, the green LED goes out and then back on again. Since I replaced all the caps on the inverter and power supply its shutdown intervals are longer. I haven't replaced the main filter cap but now I'm just lost on what to do? I've tried resetting but no luck. Anyone know what else to do?
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    • R_J
      Badcaps Legend
      • Jun 2012
      • 9535
      • Canada
      #2
      Re: Sony KLV-37S400A Weird Issues

      I would remove the power supply board and inspect the solder connections, especially the connections on the transformers and transistors etc. attached to the heat sinks. If it is a poor connection, you could try tapping the boards with something to see if you can cause the fault. Or try a heat source like a hair drier to see if that can cause the fault to show up.

        Comment

        • Kyleadonis
          Member
          • Oct 2020
          • 17
          • South Africa
          #3
          Re: Sony KLV-37S400A Weird Issues

          Thanks R_J I will give that a try

            Comment

            • Kyleadonis
              Member
              • Oct 2020
              • 17
              • South Africa
              #4
              Re: Sony KLV-37S400A Weird Issues

              Okay so I desoldered all the transformers and transistors and resoldered them all back(I also checked on the transformers if there are any broken connections and there are none, I put all the transistors in my component tester and they seem to test fine), now the TV stays on longer but still makes a clicking sound then a pop through the speakers and then off

                Comment

                • dskall
                  Badcaps Legend
                  • Oct 2016
                  • 2905
                  • usa
                  #5
                  Re: Sony KLV-37S400A Weird Issues

                  You might try powering it on in a darkened room and see if there is any visible flashing. Especially around backlight inverter.
                  I assume no responsibility for any stupid suggestions I might post.

                    Comment

                    • Kyleadonis
                      Member
                      • Oct 2020
                      • 17
                      • South Africa
                      #6
                      Re: Sony KLV-37S400A Weird Issues

                      Hi dskall

                      Its worth a try.


                      Thanks

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