: Turn the TV on. On most universal boards, the indicator light will flash rapidly during the update. Do not turn off the power until the flashing stops and the TV reboots.
: The "1920x1080" part of your query is the resolution. Ensure your TV panel matches this; installing 1080p firmware on a 720p panel can result in a distorted image or a "no display" state. How to Install the Firmware
Finding a specific "rar" file for this firmware usually involves specialized technician forums or firmware databases. Here is how you can locate and use it: Where to Find the Download Download RR8501 C031A V50 1920x1080 USB rar
: Search for the exact string RR8501 C031A V50 firmware on Google. Be cautious of "Solid Content" sites as they often require a paid subscription or specific forum credits to download files.
If you find the .bin file inside the .rar archive, the general procedure is: to FAT32. : Turn the TV on
: Extract the .bin file from the .rar archive and place it in the root directory of the USB (not in a folder).
: Plug the drive into the TV's USB port while the power is off. : The "1920x1080" part of your query is the resolution
Do you have the printed on the circuit board to ensure this is the exact match?