The "part2.rar" suggests the total firmware file was split into multiple parts (likely due to file size limits on hosting sites like MediaFire or Mega). Where to Find the Firmware

Frequently hosts "Three-in-One" USB firmware for board numbers like M338 and M358.

Another community-driven archive for universal motherboard software. Important Installation Notes

Typically, you copy the extracted .bin file to a FAT32-formatted USB drive, plug it into the TV, and power it on to begin the automatic update.

512MB RAM , indicating an entry-level Android smart TV setup.

Technicians often download these files from specialized firmware repositories. If you are looking for the exact file, reputable sources for this specific board include: