Ensure the firmware you download matches your Panel Number and Main Board Number , not just the model name, to avoid bricking the TV. Toshiba TV: How to Update

Press the Home button, navigate to Settings > System > Software Upgrade , and select Scan for update .

Specialized channels such as lcd tv led tv smart tv software frequently upload multi-part firmware files for specific motherboard numbers (e.g., MSD638 or similar).

If you are missing "part4.rar," you must ensure you have all other parts (part1, part2, and part3) from the same source , as different versions or regions will not be compatible when you try to extract them. How to Install Once Downloaded

Format a USB drive to FAT32 and copy the extracted file to the root directory (not inside a folder). Update Process: