: 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.
Once you have the extracted firmware file (typically named MstarUpgrade.bin or similar), follow these steps to install it: 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. : The process can take 5–15 minutes
: The TV should restart automatically once finished. Remove the USB drive and perform a factory reset via the settings menu to ensure system stability. Troubleshooting the RT2851V09 Mainboard Download RT2851V09 3840x2160 Kivi 55U730GU part08 rar