Insert the USB drive into the TV's USB port (some recommend the port furthest from the edge). on the TV body.
To update or recover your BBK TV using this firmware, follow these steps sourced from technical forums like Televid-Sib and KenoTronTV :
: The ".part3.rar" indicates this is the third segment of a split archive. To successfully extract the firmware, you must download all parts (usually part1, part2, etc.) into the same folder and extract only the first part using a modern version of 7-Zip or WinRAR. Download RT2841P638 1366x768 JPE BBK part3 rar
While holding the button, plug the TV back into the power outlet.
: The TV will usually restart or go into standby once finished. Do not remove the USB drive until the TV has fully rebooted and you have completed the initial setup. Insert the USB drive into the TV's USB
: Keep holding the button for 10–15 seconds until a progress bar or a blue rectangle appears on the screen. The LED indicator may blink red and green during this process.
: Place the extracted install.img (or similar .bin file) directly into the root directory of the USB drive (do not put it in a folder). Initiate Update : Unplug the TV from the power outlet. To successfully extract the firmware, you must download
: Use a 4GB to 16GB USB flash drive formatted to FAT32 .