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: The process can take 5–15 minutes. Do not power off or unplug the TV during this time, as it can permanently damage the mainboard.
Enter your TV's Serial Number (found on the back panel of the TV) to ensure the software matches your hardware revision. Download RT2851V09 3840x2160 Kivi 55U730GU part08 rar
Once you have the extracted firmware file (typically named MstarUpgrade.bin or similar), follow these steps to install it: : The process can take 5–15 minutes