Chosen Solution

I recently had my picture go out on my Sony XBR 900E TV. After some research it seemed the reason was a bad Tcon board. I made sure I got the right model and that the new board had the same ID number as the old one. Well after instalation, when I turned the TV on I no longer even have the back light tun on and the LED blinks green and red. I put the old board back in and it tuned on as normal but still no picture. So my situation is: Old card has sound and black light but no picture. New card has no backlight and blinking LED. Did I just get a bad new card, or am I missing something here?

@ursa Sounds like your T-con board is shortening some circuit. It should definitely not prevent the backlight from coming on. I’d try another board, why do you think it is the t-con board that is the issue here. You say you have backlight that means your power board is most likely not the issue. My first suspect would have been the main board

If you have a green/amber flashing light and no picture at all after installing a new board it means you have to update the firmware because the main board isn’t recognizing the screen. This is easier said than done when you can’t see any menus on the screen so look up instructions on how to do this by USB.

  1. You may need to factory reset (hold down Vol- and power switches on the TV and then plug into power, release buttons when you see the green LED).
  2. It will take hours because the file is large, do not get impatient and turn it off at the wall because you think nothing is happening.
  3. You may need to try it a couple of times. First turning it on at the wall and then inserting USB and then try power on with USB inserted. Or Factory reset and add USB or Factory reset with USB in. I can’t recall which worked for me so try them in turn and each time leave it for hours or overnight. Eventually you will come back to a rebooted TV!