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Samsung UE40d550 main board bn94-05188v

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    Samsung UE40d550 main board bn94-05188v

    Hi there. I have this tv and what happened is at follows.
    I had the rebooting problem with it and solved it by ordering the nand and replacing it. Atfer that it had no hdmi imput from any of them 1 through 4. Entered service mode factory reset same thing.
    In the end i entered service mode again and i had changed some setting (dont remember wich one) and the tv froze. Unplugged it and after plugging it back in if has no stand by light at all and is completly dead.
    Opened it up and found out that the processor heats up farly high (not sure if thats normal or not)
    The thing is that i dont know if i killed it by changing that setting or if it was just pure coincidence and the processor just died out.
    if i disconnect the main board i get backlight on the tv.
    My guess is that even if that setting changed it in any way it can't really make it that is dead dead. Can it?
    Dont ask me what setting i changed because i have no idea.
    Where is that service mode stored? In NAND or in some other part

    #2
    Re: Samsung UE40d550 main board bn94-05188v

    If HDMI did not work, then it was necessary to reflash the EEPROM 24C256.
    And after installing a new NAND, you need to do it through the service menu "Factory reset".
    Last edited by lotas; 10-26-2022, 03:11 PM.

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      #3
      Re: Samsung UE40d550 main board bn94-05188v

      Did you happen to run the command: "Micom Update"?

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        #4
        Re: Samsung UE40d550 main board bn94-05188v

        So the firmware was not good from the start then? Someone sent me the ic already programmed so i could not reprogrm it. I have a RT809 but not adaptor for it. Does this RT809 have an adapter for the ic of the tv?
        And is there any way to repair the motherboard? Or that change in setings fried the cpu.
        Thanks in advance

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          #5
          Re: Samsung UE40d550 main board bn94-05188v

          Rather, the Nand firmware was good (the TV stopped rebooting), if the HDMI ports do not work, then you need to reflash the eeprom 24C256, if you changed something and ran the command: "Micom Update" in the service menu and the TV turned into a brick, then you need to reprogram the Micom WT61P8 , if necessary, I can throw these firmware on 24С256 and WT61P8.

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            #6
            Re: Samsung UE40d550 main board bn94-05188v

            Too much of a hussle. Any1 who might have a motherboard for this one functional? Thanks

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