The process can take 5–10 minutes. Do not power off the TV during this time, as it can cause permanent hardware failure. Where to Find the Firmware

The mention of "part4.rar" indicates you are likely downloading a multi-part archive. You must download all parts (e.g., part1, part2, part3, and part4) before you can successfully extract the final firmware file.

Finding and installing the firmware is essential for resolving software-related issues such as boot loops, hanging on the logo, or app compatibility problems on this specific Smart TV model. Overview of Firmware Components

Do you need help or identifying the correct USB port for the update? How to update the Samsung TV's firmware using a USB drive

Once extracted, the result is typically a .bin or .pkg file (often named MstarUpgrade.bin or upgrade_loader.pkg ), which the TV recognizes as an update package. Installation Steps via USB

Extract all RAR parts on your PC and copy the final firmware file directly to the root directory (not inside any folders) of the USB drive. Initiate Update: Turn off the TV and unplug the power cord. Insert the USB drive into the USB 1 or white-labeled port.

When downloading firmware for the BRANDT BAB43F5SNA, the files are often split into multiple compressed parts due to their large size.