Ensure your USB flash drive is formatted to FAT32 .
While direct official download links for specific archived parts are rarely hosted on the main manufacturer site, they are commonly found on specialized TV repair forums and technical YouTube channels: Download ONIDA 55UIB Software part04 rar
You can check the Onida Innovations page or contact their customer service to see if they can provide the exact firmware for your 55UIB model based on its serial number. Ensure your USB flash drive is formatted to FAT32