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:
Often host bin files for these specific RTD/MSD chipsets. Download MS338 PB801 1366x768 512M REF35 part4 rar
until the process is 100% complete.
Right-click Part 1 and select "Extract Here." You should get a file named allinstall.bin or similar. Since "Part 4" indicates a split archive, you
One of the most reliable archives for China-made universal boards and branded LED TVs. Download MS338 PB801 1366x768 512M REF35 part4 rar
Hold the on the TV (not the remote) and plug it back in. Release when the standby light begins flashing rapidly.