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Sony XBR-55x900F mainboard replace firmware upgrade

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    Sony XBR-55x900F mainboard replace firmware upgrade

    Hello every body, I found a bad main on this tv so I ordered a replacement and I installed the new one and powered up the tv to find a dead tv with flashing red/green power led. I contacted the seller and was told I need to upgrade the firmware in order for the new main board to work.

    How do I upgrade a tv that is dead wont power up?

    #2
    Re: Sony XBR-55x900F mainboard replace firmware upgrade

    Hello,

    If your getting flashing amber/green light the tv is not dead. It’s simply asking for the firmware update. You will need to download the firmware from Sony’s website and put it on a thumb drive. Plug the thumb drive into the USB port and plug the tv into power. Press the power button and it will flash amber/green then go to a pulsing white once it is installing. It can take up to 45min so be patient. Here is a great YouTube video by nicks tv that helps with loading firmware

    https://www.youtube.com/watch?v=3kYPjIHt8Lc

    Hope this helps.

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      #3
      Re: Sony XBR-55x900F mainboard replace firmware upgrade

      Great link!
      Careful though, make sure to be patient. Don't unplug the set willy nilly. That can break the board. I suggest watching the entire video and then going back and following the steps.

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