: 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.

: Once extracted, you will typically find a single file named install.img or CtvUpgrade.bin . Firmware Installation Guide

: 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.

: 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.

: 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.

To update or recover your BBK TV using this firmware, follow these steps sourced from technical forums like Televid-Sib and KenoTronTV :

: Use a 4GB to 16GB USB flash drive formatted to FAT32 .