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Sony kdl 40ex720 firmware update

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    #21
    Re: Sony kdl 40ex720 firmware update

    You have that the backlight is not working, you can insert the cable back when error 5 appears.

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      #22
      Re: Sony kdl 40ex720 firmware update

      You mean if I plug back the lvds cable when error 5 appears I am gonna have backlight?

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        #23
        Re: Sony kdl 40ex720 firmware update

        Originally posted by lotas View Post
        Try disconnecting the LVDS cable from T_CON and turning on the TV, when the backlight turns on without turning off the TV, insert the cable carefully back quickly and without distortions, an image should appear, reset and update via usb. Do you have firmware PKG4.027EUA?
        yes i have that firmware

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          #24
          Re: Sony kdl 40ex720 firmware update

          To Lotas, if the tv shows an error code i think is in standby protected mode, it can't turn back to On mode.. To Dino: alternating green-yellow is typical of Sony when detected an hardware pairing change between mb<>tcon, you need to find the key conbination to force update, since tv is already updated it normally refuses updating... have you read the service manual?
          Last edited by Davi.p; 02-28-2023, 01:25 PM.

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            #25
            Re: Sony kdl 40ex720 firmware update

            Yes I saw the service manual and I read that you can't update if it has the latest firmware but I I didn't find anything about force update.. Do you know the key combination for the force update?

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              #26
              Re: Sony kdl 40ex720 firmware update

              no i was meaning the reset procedure

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                #27
                Re: Sony kdl 40ex720 firmware update

                And how can do that please?

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                  #28
                  Re: Sony kdl 40ex720 firmware update

                  i don't have the manual on the tablet, don't have wish to watch non the pc.. for now

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                    #29
                    Re: Sony kdl 40ex720 firmware update

                    Ok i will check the manual thank you

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                      #30
                      Re: Sony kdl 40ex720 firmware update

                      When it enters recovery mode, it doesn't matter to it what firmware you installed on usb, as long as it is not lower than the one that is currently installed. How do you prepare usb flash for upgrade?

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                        #31
                        Re: Sony kdl 40ex720 firmware update

                        I format it to fat32 and I unzip the folder to the root of the flash drive as the manual says.

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                          #32
                          Re: Sony kdl 40ex720 firmware update

                          Try it - the firmware file itself is "00000100_07e8046a.bin" (without folders). And without quotes.
                          Last edited by lotas; 02-28-2023, 03:29 PM.

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                            #33
                            Re: Sony kdl 40ex720 firmware update

                            I try it but no luck

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                              #34
                              Re: Sony kdl 40ex720 firmware update

                              There is another option, do you have a good command of a soldering iron for smd components?

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                                #35
                                Re: Sony kdl 40ex720 firmware update

                                Yes I can solder smd components

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                                  #36
                                  Re: Sony kdl 40ex720 firmware update

                                  I understand from your topic that you replaced the T-con board, I hope the old T-Con board remained (what happened with the old board and which one you changed to (diagonal, model ..). Write in detail your actions.

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                                    #37
                                    Re: Sony kdl 40ex720 firmware update

                                    No sorry maybe I didn't explain well.. I replace the batv board not the tcon board

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                                      #38
                                      Re: Sony kdl 40ex720 firmware update

                                      Then this option, which I wanted to offer, will not help (I thought it was T-con), then only an update via usb.
                                      And can you buy a native T-con, where did you get the motherboard? Or he had a different diagonal.
                                      Last edited by lotas; 02-28-2023, 04:25 PM.

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                                        #39
                                        Re: Sony kdl 40ex720 firmware update

                                        What do you mean a native tcon? I bought a used batv board from 46ex720 tv not for the 40 inches one that I have.

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                                          #40
                                          Re: Sony kdl 40ex720 firmware update

                                          he means the tcon originally mounted in the same tv where the spare mb came from..

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