: 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.
: 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. Download RR8501 C031A V50 1920x1080 USB rar
: Look for sites like Kazmi Elecom , Labone Inside , or Azeem Tech . These communities often host archives of universal TV board software. : 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). : Search for the exact string RR8501 C031A
: Plug the drive into the TV's USB port while the power is off.