Andersson "Vestel" LCD no picture

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  • PowerAmpFreak
    Badcaps Veteran
    • Feb 2010
    • 977
    • Sweden

    #1

    Andersson "Vestel" LCD no picture

    Yet another Vestel TV problem.
    This is made under the brand "Andersson" and problem is no picture is shown. Sound is working OK.
    Backlight turns on, the obvious PSU outputs OK (+24V, +5V, +3.3V)
    But there are no image at all.
    A brief check of the onboard voltage regulators on mainboard revealed nothing abnormal. Picture processing IC's normal heat during operation.
    Could this be a T-CON failure?
    Please check the attached pictures.
    Attached Files
  • martyparish
    Badcaps Veteran
    • Dec 2012
    • 313
    • United States

    #2
    Re: Andersson "Vestel" LCD no picture

    Probably not the issue but is that a bulged cap I see near the connectors?

    Also, could you upload a shot of the t-con?

    Comment

    • PowerAmpFreak
      Badcaps Veteran
      • Feb 2010
      • 977
      • Sweden

      #3
      Re: Andersson "Vestel" LCD no picture

      Originally posted by martyparish
      Probably not the issue but is that a bulged cap I see near the connectors?

      Also, could you upload a shot of the t-con?
      Which connectors?

      Comment

      • garry7263
        Senior Member
        • Feb 2013
        • 105
        • USA

        #4
        Re: Andersson "Vestel" LCD no picture

        Bottom of the power board. There are connectors, from the left over three connectors and up there are two capacitors, the one on the left looks like a bulged cap.

        Comment

        • PowerAmpFreak
          Badcaps Veteran
          • Feb 2010
          • 977
          • Sweden

          #5
          Re: Andersson "Vestel" LCD no picture

          Yeah, you're right. It sure looks bulged. I thought I was carefully check the caps on the psu board, but still missed one of them.
          Will check if this might solve the problem. Still, the output voltages are correct from the psu.

          Comment

          • tom66
            EVs Rule
            • Apr 2011
            • 32560
            • UK

            #6
            Re: Andersson "Vestel" LCD no picture

            The fuse on these T-con tends to blow without obvious cause. Just replace the fuse and it will usually fix it.
            Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
            For service manual, schematic, boardview (board view), datasheet, cad - use our search.

            Comment

            • PowerAmpFreak
              Badcaps Veteran
              • Feb 2010
              • 977
              • Sweden

              #7
              Re: Andersson "Vestel" LCD no picture

              Originally posted by tom66
              The fuse on these T-con tends to blow without obvious cause. Just replace the fuse and it will usually fix it.
              Thanks Tom, I see you are very familiar with those Vestel's aswell
              By the way - this psu has two 18nF caps instead of the normal failing 15nF.
              Do you know if those 18nF's last longer? It appears aswell that the 18nF caps are another kind, probably cope better with high Dv/Dt.

              Comment

              • tom66
                EVs Rule
                • Apr 2011
                • 32560
                • UK

                #8
                Re: Andersson "Vestel" LCD no picture

                18nF is necessary for older 37" and some 42", you have 17PW16 I think, which is higher power PSU for bigger screen.
                Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
                For service manual, schematic, boardview (board view), datasheet, cad - use our search.

                Comment

                • PowerAmpFreak
                  Badcaps Veteran
                  • Feb 2010
                  • 977
                  • Sweden

                  #9
                  Re: Andersson "Vestel" LCD no picture

                  Tom, do you have a picture of how this fuse looks like so I can begin sourcing. Thanks!

                  Comment

                  • tom66
                    EVs Rule
                    • Apr 2011
                    • 32560
                    • UK

                    #10
                    Re: Andersson "Vestel" LCD no picture

                    Got a picture of the T-con?
                    Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
                    For service manual, schematic, boardview (board view), datasheet, cad - use our search.

                    Comment

                    • PowerAmpFreak
                      Badcaps Veteran
                      • Feb 2010
                      • 977
                      • Sweden

                      #11
                      Re: Andersson "Vestel" LCD no picture

                      Well, reason for asking was actually that I won't be close to this set in a few days. So to save time I wanted to source the correct kind of fuse. When I check the T-con I will see the fuse, but if you had a picture of that fuse right now I could source it right away.

                      Comment

                      • tom66
                        EVs Rule
                        • Apr 2011
                        • 32560
                        • UK

                        #12
                        Re: Andersson "Vestel" LCD no picture

                        I unfortunately do not know, it is often different.
                        Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
                        For service manual, schematic, boardview (board view), datasheet, cad - use our search.

                        Comment

                        • martyparish
                          Badcaps Veteran
                          • Dec 2012
                          • 313
                          • United States

                          #13
                          Re: Andersson "Vestel" LCD no picture

                          Why don't you look the board up on shopjimmy.com and reference that image?

                          Comment

                          • PowerAmpFreak
                            Badcaps Veteran
                            • Feb 2010
                            • 977
                            • Sweden

                            #14
                            Re: Andersson "Vestel" LCD no picture

                            Originally posted by martyparish
                            Why don't you look the board up on shopjimmy.com and reference that image?
                            Guess you didn't read a few lines up...

                            Comment

                            • martyparish
                              Badcaps Veteran
                              • Dec 2012
                              • 313
                              • United States

                              #15
                              Re: Andersson "Vestel" LCD no picture

                              I read the whole thread thanks! All I see is that you are not near the TV, so I suggested you look the TV up online...

                              Comment

                              • PowerAmpFreak
                                Badcaps Veteran
                                • Feb 2010
                                • 977
                                • Sweden

                                #16
                                Re: Andersson "Vestel" LCD no picture

                                Originally posted by martyparish
                                I read the whole thread thanks! All I see is that you are not near the TV, so I suggested you look the TV up online...
                                Thanks! I will dig into this today so mystery will be solved (hopefully)
                                Will return as soon as I have the whole picture.

                                Comment

                                • PowerAmpFreak
                                  Badcaps Veteran
                                  • Feb 2010
                                  • 977
                                  • Sweden

                                  #17
                                  Re: Andersson "Vestel" LCD no picture

                                  Bad luck, found a blown SMD fuse on logic board. Changed this, but then screen goes white, so obviously this T-con is bad...
                                  The left part of the screen is all white and the right part is like bright gray.

                                  Comment

                                  • selldoor
                                    Slow Learner
                                    • Dec 2010
                                    • 7870

                                    #18
                                    Re: Andersson "Vestel" LCD no picture

                                    could still be just a fuse on the Tcon?
                                    Please upload pictures using attachment function when ask for help on the repair
                                    http://www.badcaps.net/forum/showthread.php?t=39740

                                    Comment

                                    • PowerAmpFreak
                                      Badcaps Veteran
                                      • Feb 2010
                                      • 977
                                      • Sweden

                                      #19
                                      Re: Andersson "Vestel" LCD no picture

                                      As Garry stated so clearly there was a bulged cap on the powersupply. I was so focused on the T-con so I actually forgot to replace that
                                      When it's replaced, the set is back in life again!
                                      Guess the excessive supply ripple killed the T-con fuse.
                                      I send my apology to Marty if I choosed the wrong words (I blame my bad English) and sounded crude, not my intention.

                                      Comment

                                      • martyparish
                                        Badcaps Veteran
                                        • Dec 2012
                                        • 313
                                        • United States

                                        #20
                                        Re: Andersson "Vestel" LCD no picture

                                        Haha glad it's fixed! And that was me that originally pointed out a bad cap Good job! I've got two here now that I wish I could solve.

                                        cheers

                                        Comment

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