: Press and hold the Power Button on the TV (not the remote) for 5 to 7 seconds until the front LED begins to blink.
Do you have the (e.g., TP.MT5510S.PB801) from inside the TV to help narrow down the specific firmware file? Download ONIDA LEO43HG Firmware USB rar
: Most smart TVs only recognize USB drives formatted to the FAT32 file system. : Press and hold the Power Button on
Alternatively, if the TV is still functional, you can check for official over-the-air updates by navigating to > Device Preferences > About > System Update . if the TV is still functional
: The update will start automatically. Do not switch off or unplug the TV during this process, which typically takes 3 to 7 minutes.