Press and hold the on the TV panel (not the remote).
Once the update reaches 100%, the TV will usually reboot. Remove the USB drive immediately to prevent it from entering the update cycle again. Troubleshooting & Sources
Downloading incorrect firmware can permanently damage your TV's mainboard. Ensure your board number matches exactly.
Place the extracted firmware file (e.g., all_upgrade_v638.bin ) directly into the root directory of the USB drive (not inside any folder). Initiate Update: Power off the TV and unplug it from the wall. Insert the USB drive into the USB 2.0 port on the TV.
Common panels include T500QVN03 and ST5461D08-1 Understanding the "Part10.rar" File