After the progress bar reaches 100%, the TV will typically reboot. Remove the USB drive immediately after the TV turns off.
What is the (usually on a sticker inside the case)? Are you upgrading to fix a boot loop or to add features ? hktrt2861v09 firmware install
Use a high-quality USB 2.0 or 3.0 flash drive (formatted to FAT32). 2. Where to Download Firmware After the progress bar reaches 100%, the TV