If you cannot find the specific split archive parts online, the most reliable way to update your firmware is through the TV's built-in system settings or by contacting the manufacturer directly. :
The TV will check for available updates. If one is found, you can download and install it directly. Download ONIDA LEO40FAIN Software part5 rar
: Do not turn off the TV or remove the USB until the process is 100% complete, as this can permanently damage the software. Where to Find Firmware Files If you cannot find the specific split archive
:If you have the complete firmware file (usually a .bin or .img file), you can install it manually: Format a USB drive to FAT32 . Download ONIDA LEO40FAIN Software part5 rar
Finding the specific "part5.rar" file for an Onida LEO40FAIN