Sony XBR-55x900F mainboard replace firmware upgrade

[high-tech]

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?

[nicholas1110]

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.

[Nick's Tvs]

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.