Check the official portal (though specific controller firmware is often third-party or OEM).
Once the light stops blinking or the screen reboots, remove the USB drive. To help you get the exact version, could you tell me: What is the of the controller board? Are you trying to fix a distorted image or a blank screen ? Do you have the original remote for the device? Download T56J11 1024X768 170828 SAMSUNG rar
Ensure you back up existing settings or firmware before flashing. Download T56J11 1024X768 170828 SAMSUNG rar
Confirm your panel resolution is exactly 1024x768 . Download T56J11 1024X768 170828 SAMSUNG rar