Because Lloyd does not openly list raw firmware files for public download on their consumer site, you must reach out to their technical division:
A local repair technician can use a or an RT809H programmer to flash the internal "Boot file" or SPI flash memory chip directly on the motherboard.
If your Lloyd TV still powers on and can access the settings, you should always check for official OTA (Over-The-Air) updates directly through the manufacturer's server: Open the menu on your TV. Navigate to Device Preferences (or System) > About . Select System Update .