Do power off the TV until the flashing stops, which usually takes about 3 minutes.

For official updates on standard Samsung TVs, you should use the Samsung Download Center to ensure you have the correct, secure firmware for your specific model. Update the software on your Samsung smart TV or monitor

You can find these firmware files, often divided into multiple parts (like part05.rar), on platforms that archive TV software:

Once you have downloaded all parts and extracted the .bin file, follow these steps: : Use a USB drive formatted to FAT32 or NTFS .

Turn the power on; the indicator light should flash, indicating the update is in progress.