Turn off the power to the LED TV or unplug it. Insert USB: Plug the drive into the USB port of the board.
Once the blinking stops or the TV restarts, remove the USB drive. Download RR8501 C031A V50 1440x900 USB rar
Download the .rar file and extract the contents. Copy the firmware file (often named SI6M33.bin or similar) directly to the root directory of your USB drive—do not put it inside a folder. Turn off the power to the LED TV or unplug it
Search for the specific file on repositories like Lab-One Inside or Zainab Tech . Download RR8501 C031A V50 1440x900 USB rar
If you need to adjust further settings (like mirror image or logo), you can often access the service menu by pressing Menu + 1147 on the remote.