One of the most reliable archives for China-made universal boards and branded LED TVs.
Since "Part 4" indicates a split archive, you must ensure you have (Part 1, 2, 3, and 4) in the same folder before extracting, or the file will be corrupted. Common Sources for this Firmware: Download MS338 PB801 1366x768 512M REF35 part4 rar
Place the .bin file in the root directory of the USB (not in a folder). Flash: Power off the TV at the wall. Insert the USB. One of the most reliable archives for China-made