is a common 4-core WiFi smart TV motherboard used by various manufacturers, including brands like Shownic.
The "part1" in the filename indicates that the software was too large for a single upload and has been split into multiple segments (e.g., part1.rar, part2.rar).
While procedures vary by brand, updating motherboard firmware usually follows these steps:
The firmware is often distributed in a format, which is a proprietary compression system.