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Connect40 Loewe TV manual / advice please

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    Connect40 Loewe TV manual / advice please

    Hi all

    This set seems to power up , with LED at front changing to GREEN , but no picture , or backlight , plus cannot set TV back to standby .

    Suspecting main board issue .

    Powered the backlights independently & they light up ok .

    Disconnected HDD & powered , with same results .

    Checked supplies at all the buck regulator outputs on main board & again seem ok .

    Anyone have experience working on this model .
    Attached Files

    #2
    Re: Connect40 Loewe TV manual / advice please

    On lifting the main board , suspect i have discovered the issue .

    There's quite a chunky silicon thermal pad the sits between the chassi & underside of BGA CPU chip .

    Pad had leaked out quite badly & i suspect damaged CPU .

    Washed the main board with flux cleaner , then IPA , but didn't help.

    Now i require a board .

    Can anyone help ?
    Attached Files

    Comment


      #3
      Re: Connect40 Loewe TV manual / advice please

      Turn of event it seems .

      Allowed the board cool down fully , as it had been sitting on pre-heater , then powered again .

      To my delight set powered ,with half picture good & the other noise .

      Pressured the LVDS processing chip & picture corrected itself .

      Time for a re-ball me thinks .
      Attached Files

      Comment


        #4
        Re: Connect40 Loewe TV manual / advice please

        So need to reflow chips.
        I assume no responsibility for any stupid suggestions I might post.

        Comment


          #5
          Re: Connect40 Loewe TV manual / advice please

          The LVDS BGA chip , yes .

          I tend to re-ball rather than re-flow , as it's more reliable .

          Comment


            #6
            Re: Connect40 Loewe TV manual / advice please

            I would at least reflow main chip also
            I assume no responsibility for any stupid suggestions I might post.

            Comment


              #7
              Re: Connect40 Loewe TV manual / advice please

              Thanks , did consider that also , but will see how the LVDS chip re-ball goes .

              Comment


                #8
                Re: Connect40 Loewe TV manual / advice please

                Stencil arrived , re-balled LVDS chip & TV now running on test .

                No audio via HDMI 1 for some reason , but not really concerned , as customer has another 3 ports to play with .

                Comment


                  #9
                  Re: Connect40 Loewe TV manual / advice please

                  Interesting, have not seen a tv with an actual sata hard drive.

                  Comment


                    #10
                    Re: Connect40 Loewe TV manual / advice please

                    Hi yes , Loewe have to be different .

                    Set also seemed to be shutting down by itself, but to be fair i had been running it without heat sinks on LVDS & CPU chips , albeit with a fan pointed at them .

                    Refreshed thermal paste & fitted the sprung loaded heat sinks back & now seems to be behaving .

                    May potentially need to also re-ball CPU at some point therefore will order a stencil for that as well .
                    Attached Files

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