: Press and hold the Power button on the TV (not the remote) for 5–10 seconds until the standby LED begins to blink rapidly, indicating the update has started.
The firmware for the mainboard is typically distributed in multiple compressed parts (such as .rar part01 through part08) due to its large size. To successfully update or repair your TV using these files, you must download all parts into a single folder and extract them together to obtain the final .bin or .img firmware file. How to Obtain Official Software Download RT2851V09 3840x2160 Kivi 55U730GU part08 rar
Enter your TV's Serial Number (found on the back panel of the TV) to ensure the software matches your hardware revision. : Press and hold the Power button on