Compressed .rar (Part 1). Note that you typically need all parts (Part 1, Part 2, etc.) in the same folder to successfully extract the final firmware file. How to Use the USB Boot Firmware

Wait for the process to reach 100%. during this time, as it can permanently damage the motherboard.

Format a USB drive to FAT32 and copy the extracted file to the root directory (do not put it in a folder). Installation: Turn off the TV and unplug it from power. Insert the USB drive into the TV's USB port.

You can often find these files hosted on community technical forums or via direct Google Drive links provided by repair specialists. How to Update Smart Tv Software by Usb @KazmiElecom