Look for a file named upgrade.bin or similar. Prepare USB Drive: Use a USB drive formatted to FAT32 .
Copy the upgrade.bin file directly to the root directory (not inside a folder). Unplug the TV. Insert the USB drive into the USB port. Download ONIDA LEO40FAIN Software part3 rar
Use software like WinRAR or 7-Zip . Right-click on part1.rar and select "Extract Here". It will automatically combine the data from part2 and part3 . Look for a file named upgrade