Bush LT26M1CA intermittent fault

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  • habanerocat
    Senior Member
    • Nov 2014
    • 96
    • Ireland
    #1

    Bush LT26M1CA intermittent fault

    Hi all,

    The intermittent problem is that the TV will power on ok most of the time. Unfortunately sometimes it just powers on to a blank white/grey screen. Sound is present.

    It was worse until I pulled it apart and then put it back together. Sometimes it will run away fine all day. Then some mornings it powers on faulty. Re-power and it's ok.

    Could this be bad caps? PSU looks good, no overheating. Caps look good also.

    Any ideas, pleases help.

    Hab.
    Tags: None
    • sordids999
      Badcaps Legend
      • May 2013
      • 2152
      • uk
      #2
      Re: Bush LT26M1CA intermittent fault

      Posting pictures of the back of your tv showing the boards with clear pictures may help you more with fixing your problem

        Comment

        • ReeceyBurger123
          Never Give Up !
          • May 2014
          • 7325
          • Britain
          #3
          Re: Bush LT26M1CA intermittent fault

          Image of the fault please ? Sounds like tab bond issue to me.
          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

            • habanerocat
              Senior Member
              • Nov 2014
              • 96
              • Ireland
              #4
              Re: Bush LT26M1CA intermittent fault

              I've uploaded a couple of photos below.

              TV has been ok today, so no image of the faulty screen.
              Generally it's just a blank white/grey screen. Sometimes some light shaded lines are visible. TV menus don't display. Sound come through ok.



              Attached Files

                Comment

                • habanerocat
                  Senior Member
                  • Nov 2014
                  • 96
                  • Ireland
                  #5
                  Re: Bush LT26M1CA intermittent fault

                  Here is a sample of how it powers on sometimes.

                  Any ideas, anybody?
                  Attached Files

                    Comment

                    • stj
                      Great Sage 齊天大聖
                      • Dec 2009
                      • 31011
                      • Albion
                      #6
                      Re: Bush LT26M1CA intermittent fault

                      did you replace any caps?
                      there is a poly in the psu and a rubycon on the main - very strange!

                        Comment

                        • ReeceyBurger123
                          Never Give Up !
                          • May 2014
                          • 7325
                          • Britain
                          #7
                          Re: Bush LT26M1CA intermittent fault

                          If you try flexing or tapping the top corners of the screen does the fault come and go ?
                          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

                            • habanerocat
                              Senior Member
                              • Nov 2014
                              • 96
                              • Ireland
                              #8
                              Re: Bush LT26M1CA intermittent fault

                              Originally posted by stj
                              did you replace any caps?
                              there is a poly in the psu and a rubycon on the main - very strange!
                              No, I haven't replaced any caps.

                                Comment

                                • habanerocat
                                  Senior Member
                                  • Nov 2014
                                  • 96
                                  • Ireland
                                  #9
                                  Re: Bush LT26M1CA intermittent fault

                                  Originally posted by ReeceyBurger123
                                  If you try flexing or tapping the top corners of the screen does the fault come and go ?
                                  No, flexing or tapping doesn't seem to make it worse or better. It seems to be related more to powering on with or without the fault.

                                  With that said I have once seen it go faulty while on. Also it came good once when I touched the ribbon cable between main and the screen (pictured).

                                    Comment

                                    • CapLeaker
                                      Leaking Member
                                      • Dec 2014
                                      • 8146
                                      • Canada
                                      #10
                                      Re: Bush LT26M1CA intermittent fault

                                      What happens if you heat the TCon board up with a hair dryer, then turn the TV on?

                                        Comment

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