The HK.T.RT2841P631 is a highly versatile board often paired with different panels (LG, Samsung, etc.).
This indicates the file is part of a split RAR archive. You must download all parts (Part 1 through Part 5) into the same folder before extracting them to avoid "missing volume" errors. Where to Download
Do not turn off the power during this process, as it can permanently "brick" your TV.
It is critical to match your TV’s native resolution. Using a 1080p firmware on a 768p panel can result in no display or a distorted image.
Download all parts of the RAR archive. Right-click "Part 1" and select "Extract Here." This will combine all parts into a single .bin or .pkg file.
Plug the TV back in. On many models, the update starts automatically, and the standby light will begin to blink rapidly.
How to Fix and Update Your LED TV with HK.T.RT2841P631 Firmware
Sometimes after a flash, the default remote code changes. You may need a universal remote or to search for a specific remote-matching firmware.