Use a reliable, high-quality USB 2.0 flash drive (8GB or 16GB is ideal). Larger USB 3.0 drives often fail to trigger the boot-loader initialization.
: Load the verified TPD.NT72563.PB781 eMMC dump file into the programmer's control application. Wipe the existing faulty partitions, write the new boot blocks and system image data, and run a verification pass to ensure integrity. tpdnt72563pb781 firmware install
Your goal when searching is to find a firmware file whose name or description explicitly matches your mainboard number or TV model. Community-sourced files are extremely useful but come with a level of risk. Use a reliable, high-quality USB 2