Use a tool like WinRAR to extract the .rar file. You should see a single .bin file or a folder containing the firmware.
Once you have successfully downloaded and combined all parts, follow these steps to flash your TV: Download ONIDA LEO50FSAIN Software USB part08 rar
If it doesn't start, hold the on the TV panel while plugging it in. Important Safety Warnings Use a tool like WinRAR to extract the
Move the firmware file directly to the root directory of your USB drive (do not put it inside a folder). Flashing the TV: Turn off the TV and unplug the power cord. Insert the USB drive into the USB 1 port. Download ONIDA LEO50FSAIN Software USB part08 rar