If your TV is stuck on a logo or "bootlooping," use the method: Turn off the TV and unplug it from the power outlet. Insert the USB drive into the USB 2.0 slot of the TV. Press and hold the Power button on the TV (not the remote).
Copy the extracted firmware file directly to the of the USB drive (do not put it inside a folder). Installation Procedure Download RT2861P839 3840x2160 Clever55 part4 rar
Because the file is labeled "part4," it is part of a . You must have all parts (part1, part2, etc.) in the same folder to extract them successfully. Download all required parts of the RAR archive. If your TV is stuck on a logo
Release the button when the front LED starts blinking rapidly or an "Upgrading" progress bar appears on the screen. Copy the extracted firmware file directly to the