You may need to download the Tp.mt5510i.pb801 software for various reasons, including:
Insert the USB drive into the TV's USB port (prefer USB 2.0 if labeled). Tp.mt5510i.pb801 Software Download
Extract the downloaded .zip file and copy the firmware file (usually named allinstall.pkg or similar) to the root directory of the USB. Do not put it in a folder. You may need to download the Tp