Once you have all parts (including Part 3), you must extract them together into a single .bin file before the TV can read it.

Place all RAR parts (Part 1, 2, 3) in the same folder and extract Part 1; this will automatically combine them into one file.

Installing the wrong firmware can permanently "brick" your TV. Ensure the resolution (e.g., 1366x768) matches your panel before flashing.