Extract the downloaded RAR parts. The resulting file is usually named allupgrade_v368_sos.bin or similar. USB Method:
Copy the extracted .bin file to the root directory of your USB drive. Download S368LA1 1920x1080 512M USB part10 rar
512MB RAM (Note: Some variants of this board feature 1GB RAM and 8GB storage). Extract the downloaded RAR parts
Insert the USB into the TV's USB port while the power is off. Download S368LA1 1920x1080 512M USB part10 rar