Bush BMK40 no picture/sound

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  • london-freddie
    Badcaps Veteran
    • May 2015
    • 472
    • UK

    #1

    Bush BMK40 no picture/sound

    Hi
    Here I am again with my latest project just bought a dead Bush BMK40 LED TV for a tenner easy problem I thought !!!!!!!!!
    Opened it up NO board fitted no wonder it was dead
    Boards seem to be like rocking horse s*** for this tv but found one on ebay for 15 all i had to go on was bush BMK40
    Got the board a TP.SIS231.P83, only board I could find
    Fitted the board and not working
    First problem the LVDS connector on the board has two rows of 20 pins, connector on the TV has two rows of 15 pins so not sure which pins to use, connector seems to go on any combination of the pins.
    However I fitted the connector as in the picture.
    When TV is plugged in red led shows on the front, when power switch is pressed red light turns green and backlights come on but no sound on picture
    Any ideas lcd looks good
  • london-freddie
    Badcaps Veteran
    • May 2015
    • 472
    • UK

    #2
    Re: Bush BMK40 no picture/sound

    Bush BMK40 pics
    Attached Files

    Comment

    • london-freddie
      Badcaps Veteran
      • May 2015
      • 472
      • UK

      #3
      Re: Bush BMK40 no picture/sound

      No picture or sound

      Comment

      • dick_barton
        Badcaps Legend
        • Aug 2015
        • 6642
        • Wales

        #4
        Re: Bush BMK40 no picture/sound

        Check if you have any voltage on the TCON fuse.
        Willing to help but I'm no expert.

        Comment

        • london-freddie
          Badcaps Veteran
          • May 2015
          • 472
          • UK

          #5
          Re: Bush BMK40 no picture/sound

          give me couple of mins

          Comment

          • london-freddie
            Badcaps Veteran
            • May 2015
            • 472
            • UK

            #6
            Re: Bush BMK40 no picture/sound

            No voltage at TCON fuse

            Comment

            • dick_barton
              Badcaps Legend
              • Aug 2015
              • 6642
              • Wales

              #7
              Re: Bush BMK40 no picture/sound

              I would think the red wires on the LVDS cable connect to the fuse on the Tcon board but would need to be verified.
              Willing to help but I'm no expert.

              Comment

              • london-freddie
                Badcaps Veteran
                • May 2015
                • 472
                • UK

                #8
                Re: Bush BMK40 no picture/sound

                have just moved the LVDS connection down to the bottom ie: the red cables at pin 1 still no voltage at TCON fuse

                Comment

                • dick_barton
                  Badcaps Legend
                  • Aug 2015
                  • 6642
                  • Wales

                  #9
                  Re: Bush BMK40 no picture/sound

                  You need to use your meter set to ohms to find if the red wires go to the Tcon fuse.

                  Then find out which pin(s) on the main board LVDS connector (disconnected) has the supply voltage.
                  Willing to help but I'm no expert.

                  Comment

                  • dick_barton
                    Badcaps Legend
                    • Aug 2015
                    • 6642
                    • Wales

                    #10
                    Re: Bush BMK40 no picture/sound

                    An ebay picture shows the LVDS connector connected differently on the main board.

                    http://www.ebay.co.uk/itm/BUSH-LED-M...p2047675.l2557
                    Willing to help but I'm no expert.

                    Comment

                    • london-freddie
                      Badcaps Veteran
                      • May 2015
                      • 472
                      • UK

                      #11
                      Re: Bush BMK40 no picture/sound

                      ok you are right it is the red wire on the LVDS cable that goes to the TCON fuse.
                      The fuse on the TCON is marked as 125V / 3A
                      Have checked all pins on the mainboard connector no voltage at the pins connected to the red cable, several of the pins have small voltages ie 3.6v 2.5v 1.5v but nothing on the pins that would connect to the red wires to the tcon if that makes sense

                      Comment

                      • london-freddie
                        Badcaps Veteran
                        • May 2015
                        • 472
                        • UK

                        #12
                        Re: Bush BMK40 no picture/sound

                        yes thanks for that, that is now how I have got it connected Red to pin 1 at the bottom

                        Comment

                        • dick_barton
                          Badcaps Legend
                          • Aug 2015
                          • 6642
                          • Wales

                          #13
                          Re: Bush BMK40 no picture/sound

                          Are all the voltages up and running on the power supply?
                          Willing to help but I'm no expert.

                          Comment

                          • flocko
                            Badcaps Legend
                            • Nov 2012
                            • 1121
                            • uk

                            #14
                            Re: Bush BMK40 no picture/sound

                            I would think the board is not compatible,these combine boards are fitted to loads of set running lots of oddball LCD panels.TP.SIS231.P83 is just the board number the white bar code sticker number is the part number and has to be matched to the correct LCD panel used in the set. and as you bought the set with no boards fitted, the fitting of a board from any bush 40" set will be pot luck at best

                            Comment

                            • london-freddie
                              Badcaps Veteran
                              • May 2015
                              • 472
                              • UK

                              #15
                              Re: Bush BMK40 no picture/sound

                              Trying to find what screen is fitted to this tv, Are you thinking I am wasting my time with this

                              Comment

                              • flocko
                                Badcaps Legend
                                • Nov 2012
                                • 1121
                                • uk

                                #16
                                Re: Bush BMK40 no picture/sound

                                I think panel will be LSC400HM06 as this runs a T.Con.not sure as to what main board number you need some do not run a T.con at all just a LCD driver on tabs to the screen.unless you can find a board that you know comes from a BMK40 then you will have a job on your hands.will need lots checking on the net to find a match

                                Comment

                                • london-freddie
                                  Badcaps Veteran
                                  • May 2015
                                  • 472
                                  • UK

                                  #17
                                  Re: Bush BMK40 no picture/sound

                                  ok that makes sense, this panel has the driver board on the tabs, but cant find any reference anywhere as to what panel it is

                                  Comment

                                  • london-freddie
                                    Badcaps Veteran
                                    • May 2015
                                    • 472
                                    • UK

                                    #18
                                    Re: Bush BMK40 no picture/sound

                                    driver board or tcon as some sellers are calling fitted is Y13_MB7S60TS4LV0.3 but still not sure what panel this is, did find a picture of a LSC400HM06 with this driver fitted

                                    Comment

                                    • london-freddie
                                      Badcaps Veteran
                                      • May 2015
                                      • 472
                                      • UK

                                      #19
                                      Re: Bush BMK40 no picture/sound

                                      driver tab pic on ebay mine does not have the white sticker on
                                      Attached Files

                                      Comment

                                      • cheeky2
                                        Badcaps Veteran
                                        • Dec 2012
                                        • 336
                                        • uk

                                        #20
                                        Re: Bush BMK40 no picture/sound

                                        Originally posted by london-freddie
                                        driver tab pic on ebay mine does not have the white sticker on
                                        Did you ever manage to sort out this TV? I ask as I have one that I am pretty sure is the flash ic that has corrupted. I am after the binary of the flash ic if you have made a copy of it?
                                        Thanks Anthony

                                        Comment

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