Updating the firmware for a smart TV motherboard—like the with a 1366x768 resolution —is a common fix for boot loops or software glitches. This specific file is likely part of a multi-part archive used to re-flash the mainboard of "QUALITA" or generic Chinese-branded LED TVs. Guide to Installing P75 338 QUALITA Firmware

Plug the TV back in. On many models using this board, you must on the TV (not the remote) until the indicator light starts blinking rapidly.

: Multi-part archives (like part3.rar ) cannot be opened alone. You must download all associated parts (Part 1, Part 2, etc.) into the same folder on your computer before extraction.