Because this firmware is often split into multiple parts (like "part2.rar"), you must download all parts for the archive to extract correctly. You can typically find these files on dedicated TV repair and firmware forums:
: Sites like Kazmi Elecom and KenotronTV host USB update files for this board. Because this firmware is often split into multiple
: Download all parts (Part 1, Part 2, etc.) into the same folder and extract them using WinRAR or 7-Zip to get the .bin or installation file. Because this firmware is often split into multiple