Official downloads for older Onida models are rarely hosted on a public consumer site. Technicians typically source these from specialized firmware marketplaces or community groups:
Place the firmware file (often named allupgrade_...pkg or MstarUpgrade.bin ) into the root directory (not inside a folder). Flash Firmware: Power off the TV and unplug it. Insert the USB drive. Download ONIDA LEO43FIAB2 Software part01 rar
If your TV still boots, you can check for official updates through the menu: Official downloads for older Onida models are rarely