Hold the on the TV (not the remote) and plug the TV back in.
: Place the extracted firmware file directly into the root directory of the USB drive. Flash the TV : Turn off the TV and unplug it from the power source. Insert the USB drive into the USB 2.0 port. Hold the on the TV (not the remote) and plug the TV back in
: Wait for the progress bar to reach 100%. The TV will reboot automatically. Do not turn off the power during this process. Hold the on the TV (not the remote) and plug the TV back in
Release the button when the "Upgrading" or "Software Updating" screen appears. Hold the on the TV (not the remote) and plug the TV back in